Luno Bitcoin exchange review

Technical: Taproot: Why Activate?

This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given public key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

submitted by almkglor to Bitcoin [link] [comments]

Decentr ($DEC) - foundational cross-chain and cross-platform DeFi protocol

  1. SUMMARY
Decentr is a protocol designed to make blockchain/DLT mainstream by allowing DeFi applications built on various blockchains to “talk to each other”. Decentr is a 100% secure and decentralised Web 3.0 protocol where users can apply PDV (personal data value) to increase APR on $DEC that users loan out as part of of our DeFi dLoan features, as well as it being applied at PoS when paying for stuff online. Decentr is also building a BAT competitor browser and Chrome/Firefox extension that acts as a gateway to 100% decentralised Web 3.0
Allows DeFi Dapps to access all Decentr’s dFintech features, including dLoan, dPay. Key innovation is that the protocols is based on a user’s ability to leverage the value of their data as exchangeable “currency”.
  1. KEY CONCEPTS

  1. REVENUE MODEL
A fee is charged for every transaction using dPay whereby an exchange takes place between money (fiat and digital) and data, and vice versa, either as part of DeFi features or via a dApp built on Decentr. They are launching pilot programmes in the following industries:
  1. Banking/PSP Industry: On Product launch, due to Decentr’s powerful PSP connections (including the worlds #2 PSP by volume), a medium-scale pilot program will be launched, which will seed the network with 150,000 PSP customers in primarily the Spanish/LAC markets, generating revenue from day one.
  2. “Bricks and Mortar” Supermarket/Grocery Industry: Decentr aims to ensure the long-term competitiveness of “bricks and mortar” supermarkets against online-only grocery retailers, such as Amazon, by a) building secure tech that allows supermarkets to digitise every aspect of their supply chains and operational functions, while b) allowing supermarkets to leverage this incredibly valuable data as a liquid asset class. Expected revenue by Year 5: $114Mn per year.
  3. Online Advertising Industry: Decentr’s 100% decentralised platform credits users secure data with payable value, in the form of PDV, for engaging with ads. The Brave browser was launched in 2012 and in 8 years has reached over 12 million monthly active users, accented by as many as 4.3 million daily active users.
  4. TOKEN $DEC AND SALE
Decentr recently complete their token sale on a purchase portal powered by Dolomite where they raised $974,000 in 10 minutes for a total sale hardcap of 1.25M. The $DEC token is actively trading on multiple exchanges including Uniswap and IDEX. Listed for free on IDEX, Hotbit, Hoo, Coinw, Tidex, BKex. Listed on CoinGecko and Coinmarketcap. Listed on Delta and Blockfolio apps.
➡️ Circulating supply: 61m $DEC.
➡️ Release schedule and token distribution LINK -> NO RELEASE UNTIL 2021.
➡️Contract Address - 0x30f271C9E86D2B7d00a6376Cd96A1cFBD5F0b9b3
➡️Decimals - 18, Ticker - DEC
➡️Uniswap link: https://uniswap.info/pai0x3AEEE5bA053eF8406420DbC5801fC95eC57b0E0A
⭐️ HOW TO BUY VIDEO: https://www.youtube.com/watch?v=iloAiv2oCRc&feature=youtu.be
$DEC Token utility:
A tradeable unit of value that is both internal and external to the Decentr platform.A unit of conversion between fiat entering and exiting the Decentr ecosystem.A way to capture the value of user data and combines the activity of every participant of the platform performing payment (dPay), or lending and borrowing (dLend), i.e a way to peg PDV to tangible/actionable value.Method of payment in the Decentr ecosystem.A method to internally underwrite the “Deconomy.
  1. NOTABLE SUPPORTERS
Simon Dedic - chief of Blockfyre: https://twitter.com/scoinaldo/status/1283787644221218817?s=20https://twitter.com/scoinaldo/status/1283719917657894912?s=21
Spectre Group Pick : https://twitter.com/SPECTREGRP/status/1284761576873041920https://twitter.com/llluckyl/status/1283765481716015111?s=21
Patrons of the Moon/Lil Uzi: https://t.me/patronsofthemoon/6764
CryptoGems: https://twitter.com/cryptogems_com/status/1283719318379925506?s=09t
tehMoonwalker pick who is a TOP 5 influencer per Binance:https://twitter.com/tehMoonwalkestatus/1284123961996050432?s=20https://twitter.com/binance/status/1279049822113198080
Holochain was one of their earliest supporters and they share a deep connection (recently an AMA was conducted in their TG group): https://medium.com/@DecentrNet/decentr-holochain-ama-29d662caed03
  1. UPCOMING NEWS
--------------------------------------------
  1. RESOURCES:
Website: https://decentr.net
Telegram: https://t.me/DecentrNet
Medium: https://medium.com/@DecentrNet
Twitter: https://twitter.com/DecentrNet
Whitepaper: https://decentr.net/files/Decentr_Whitepaper_V1.4.pdf
Technical Whitepaper: https://decentr.net/files/Decentr_Technical_Whitepaper_Data_As_Economic_Currency.pdf
Recent Articles:
⚡️- https://medium.com/@DecentrNet/decentr-token-sale-metrics-and-distribution-483bb3c58d05
⚡️- https://medium.com/@DecentrNet/how-decentrs-defi-dloan-function-benefits-dec-holders-97ff64a0c105
⚡️- https://medium.com/@DecentrNet/3-vertical-revenue-streams-decentr-is-targeting-4fa1f3dd62de
⚡️- https://medium.com/@DecentrNet/brave-browser-the-good-the-bad-and-the-fundamentally-misguided-8a8593b0ff5b
⚡️- https://medium.com/@DecentrNet/how-decentrs-dfintech-replaces-swift-sct-inst-clearing-house-and-other-payment-solutions-78acacbb4c3f
Chad Gang STRONG Community: https://t.me/decentrtrading
Community News Channel: https://t.me/chadnews
Recent Uniswap trades: https://t.me/dectrades
Wallet holder tracker: https://t.me/DEC_WALLETS_COUNT
submitted by ldd999 to CryptoMoonShots [link] [comments]

[ Bitcoin ] Technical: Taproot: Why Activate?

Topic originally posted in Bitcoin by almkglor [link]
This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given private key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

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The Unofficial Cardano FAQ - V3

(if you would like to add information or see mistakes, just comment below and I will credit you)
What is Cardano? Cardano is an open source and permissionless "Third Generation" blockchain project being developed by IOHK. Development and research started in 2015, with the 1.0 mainnet launching in 2017. Cardano blockchain is currently being developed into two layers. The first one is the ledger of account values, and the second one is the reason why values are transferred from one account to the other.
  1. Cardano Settlement Layer (CSL) - The CSL acts as the ledger of account or balance ledger. This is an idea created as an improvement of bitcoin blockchain. It uses a proof-of-stake consensus algorithm known as Ouroboros to generate new blocks and confirm transactions.
  2. Cardano Computation Layer (CCL) - The CCL contains the data how values are transferred. Since the computation layer is not connected to balance ledger, users of the CCL can create customized rules (smart contracts) when evaluating transactions. (https://support.bitkub.com/hc/en-us/articles/360006678892-What-are-the-two-layers-of-Cardano-)
IOHK has the contract with an undisclosed party to develop the project until the end of 2020, at which point the community may elect another development team - on the assumption that the voting infrastructure has been completed. However CEO Charles Hoskinson has stated that they will develop the project until it is completed, and they are simply financed until the end of 2020.
Cardano was the first project built on a peer-reviewed scientific development method, resulting in dozens of research papers produced by IOHK. Among these papers is Ouroboros Genesis, proving that a Proof of Stake protocol can be just as secure as Proof of Work - which was originally developed for Bitcoin, and refined for Ethereum. This PoS protocol considerably lowers the resources cost to maintain network while still maintaining security and network speed.
Cardano as a financial infrastructure is not yet completed, With significant development to be rolled out.
What were the other two generations of blockchain? Gen 1 was Bitcoin. It exists by itself and talks to nobody but Bitcoin. It is capable of peer to peer transactions without a third party in such a way that you cannot cheat the system. This was a major step forward for the E-cash concept that people have been working on for the 20 years prior.
Gen 2 was Ethereum and other smart-contract platforms that allow other coins and platforms to be built on top of their infrastructure. These coins can interact with others on the platform, but cannot interact with other platforms. Meaning it is still not truly interoperable. Most Gen 2 blockchains are also using Proof of Work likes Bitcoin, which effects scaling. Also missing is a built-in method to pay for upgrades and voting mechanics for decision making.
Gen 3 blockchains are a complete package designed to replace the current financial infrastructure of the world. Cardano is using Proof of Stake to ensure security and decentralisation(Shelley). Scaling through parallel computation (Hydra in Basho), Sidechains to allow the platform to interact with other platforms (Basho), and also include mechanisms for voting for project funding, changes to the protocol and improvement proposals (Voltaire). Finally smart contracts platform for new and established projects that are developer friendly (Goguen).
Who is the team behind Cardano? There are three organisations that are contributing to the development of Cardano. The first is the Cardano Foundation, an objective, non-profit organisation based in Switzerland. Its core responsibilities are to nurture, grow and educate Cardano users and commercial communities, to engage with authorities on regulatory and commercial matters and to act as a blockchain and cryptocurrency standards body. The second entity is IOHK, a leading cryptocurrency research and development company, which holds the contract to develop the platform until 2020. The final business partner is Emurgo, which invests in start-ups and assists commercial ventures to build on the Cardano blockchain.
www.Cardano.org www.emurgo.io https://cardanofoundation.org/en/
What is the difference between Proof of Work and Proof of stake? Both these protocols are known as “consensus protocols” that confirm whether a transaction is valid or invalid without a middleman like Visa or your bank. Every node (active and updated copy of the blockchain) can agree that the transaction did take place legitimately. If more than half validators agree, then the ledger is updated and the transaction is now secured. Proof-of-Work (PoW) happens when a miner is elected to solve an exceptionally difficult math problem and gets credit for adding a verified block to the blockchain. Finding a solution is an arduous guessing game that takes a considerable amount of computing power to compete for the correct answer. It is like “pick a number between 1 and one trillion” and when you get it right, you get $30,000 in Bitcoin, so the more computers you have working on it, the faster you can solve it. Also the more people who are trying to solve the same block, the harder the algorithm, so it may become 1 in 20 trillion. The downside is the massive amounts of power required to run the computers that run the network, and the slow pace that blocks are solved. To “Hack” a PoW system, you need 51% of the computing power, which would allow you to deny transactions, or spend the same coin twice. At the moment there are 8 main mining operations for bitcoin, and 4 of them make up more that 51% of the mining power.
PoS instead selects a coin at random that already exists, and the person who owns that coin is elected to put the work in to validate the block. This means there is no contest and no guessing game. Some computer power is required, but only a fraction of a PoW system. The complex nature of selecting a coin that exists on the correct and longest chain and is owned by someone who can complete the block, AND in such a way that it is secure AND that computer currently running AND that person also having an incentive to complete the work, has made the development of PoS very slow. However only a few years ago it wasn’t even possible. In this method, the more of the coin (ADA) you stake, the more likely you are to be selected to close a block. Cardano also allows you to delegate your stake to someone else to validate the block so they do the work, and you share in the reward for doing so.
To “hack” a PoS blockchain you need to own 51% of the tokens, which is significantly harder than owning 51% of the computing power.
What is ADA and how is it different to Cardano? Cardano is the name of the network infrastructure, and can be thought of like a rail network. ADA is the native token that has been developed alongside Cardano to facilitate the network operation. This helps confusion and maintains distinction, compared to Ethereum being the native token of Ethereum. Similar to bitcoin or any other token, ADA can be sent peer to peer as payment, but is also the reward for running the network, and what is taken as transaction fees.
In this metaphor “Cardano” is the train tracks, that everything runs on. A stake pool would be the locomotive, facilitating transactions on the network while ADA is the coal that powers the locomotive. The train carriages are Decentralised applications (Dapps) that are also running on cardano tracks, but are not actively powering the network.
What is staking Cardano is a Proof of Stake protocol, and uses already existing coins like a marker to ensure security. The protocol chooses a coin at random and the owner of that coin is elected to validate a block of transactions. Staking is the process of adding your ADA coins to a Pool that has the resources to run the network. If the pool you have chosen to "delegate" your stake to is chosen to close/validate a block, then you get a portion of the rewards. The ADA never leaves your wallet, and you can "undelegate" whenever you like. this increases stability of the network and also gives an incentive to pool operators to invest the time and hardware required to run a pool.
What is a stake-pool and how does it work? Cardano.org FAQ on the issue goes into much more detail
A stake pool is where the computing power of the network takes place. During ITN there was 1200 registered stake pools while 300 were creating blocks. You can manage your own stake-pool or delegate your ADA to an already registered pool. Rewards are determined by the protocol, however the pool may elect to charge fee Percentages, or flat rate fee to upkeep their pool.
Can I Stake my ADA right now? The staking testnet has closed, If you participated in the Incentivised Test Net and earned rewards, instructions to check the balance are here.
However if you have just purchased some or it was held on an exchange, then you will need to wait until the Shelley mainnet launch happening at the end of July 2020.
Where do I stake my ADA? Daedalus Flight wallet, and Yoroi Wallet (as a chrome extension) are the current best options. Adalite and several other third-party wallets also exist. Coinbase will also allow staking as a custodial service, and many exchanges may offer “staking as a service” so you can leave your coins on the exchange and still earn rewards if you enjoy trading. I do not recommend leaving coins on an exchange unless you are actively trading.
What are the staking rewards now and what can I expect on a return in the future? The Incentivised Test Net (ITN) Delivered 10%-15%pa returns on average. The future of staking will most likely be lower, but will depend on the amount of ADA staked across the network and the amount of network traffic.
Check https://staking.cardano.org/en/calculato for a clearer picture.
what is a Pledge? To stop one person operating many pools, the rewards that a pool earns will vary depending on the amount of personal ADA they “pledge” to open the pool. This means that 50 pools with a 1,00ADA pledge each will be overall less profitable than 1-2 pool with the max ADA pledge (unknown but likely around 300k). Even if the 50 pools have the same over stake delegated by other users and have a better chance of being selected to close a block, the 50 pools may receive lower rewards.. (at least that is the theory)
Who is IOHK? IOHK is a for-profit software engineering company founded by CEO Charles Hoskinson and Jeremy Wood in 2015 that has taken a scientific approach to the development of blockchain. IOHK started with “first principles” and looked at questions like “what is a blockchain” and “what should a blockchain be able to do” rather than accepting the established paradigm of Bitcoin and Ethereum. IOHK was originally Input Output Hong Kong, but is now Input Output Global and is based in Wyoming USA employing over 230 staff. IOHK has established research labs in several universities in order to complete the Cardano project, and is also developing Ethereum Classic, Atala, Mantis and possibly other Blockchain related programs and infrastructure.
Who is Charles? Charles Hoskinson is an early adopter of cryptocurrencies, American entrepreneur and cryptocurrency specialist. Charles Co-founded Ethereum with Vitalik Buterin and 5-8 others, However he only worked on that project for approximately six-months. Charles is now the CEO of IOHK and the director of The Bitcoin Education Project.
Why isn’t ADA on coinbase? Cardano and coinbase have recently connected in a big way. With IOHK turning over all their ADA to the custodial services of Coinbase. This means that Cardano and Coinbase have been working together for some time and there is a strong partnership forming. Staking and cold storage will be available and trading on Coinbase will most likely become available after the release of Shelley (although no official word yet)
Why Doesn’t Cardano have a Wikipedia Page? Wikipedia has strict guidelines on what can be turned into an article. As there has been no coverage of Cardano from mainstream media or “noteworthy” sources, there is no article yet. Wikipedia will also not accept sources from IOHK as they are not considered “reliable” and must come from a third party. This will most likely change soon.
Cardano does have a dedicated community driven wiki
https://cardanowiki.info/wiki/Home
What is Atala and why do I care?*
Atala is a suite of services being developed on top of the cardano blockchain by IOHK that focusses on credential certification, for things like education, work history and degrees (Atala Prism). Product counterfeiting protection through registering products on a blockchain and create taper-proof provenance. This does not only apply to Gucci handbags, but also medication, art, and anything that can be counterfeited (Atala Scan). As well as supply chain tracking to see issues and inefficiencies with greater transparency(Atala Trace).
Im new, how much is a good investment?
Cardano is still a speculative market and although there is amazing potential here, it is still only potential. When investing in any High risk market like Crypto, only every invest what you are willing to lose. Cardano may be testing the 10c barrier now. But in March it dumped to 1.7c. And if you suddenly need your money back during the dump then you are out of luck. Do your research before you FOMO in. Start with a small amount and send it between wallets and exchanges to understand how the system works. Store your private keys offline (or online cloud service but encrypted) with a method that is unlikely to be damaged AND have multiple copies. So in the case of a house fire or a blow to the head, or the cloud service being shutdown/destroyed, you do not lose your money.
Timelines
https://roadmap.cardano.org/en/
Shelley Decentralisation rollout and news
Goguen smart contract rollout
Voltaire Voting mechanics – no official roll out timeline (though promised for 2020)
Basho scaling and sidechains – no official roll out time line (most likely 2021)
submitted by YourBestMateRobbo to cardano [link] [comments]

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PSA: How to use crypto to sell/buy PMs on r/PMsForSale

TL;DR 1: this is not an investment recommendation. This is not an endorsement of any crypto coin, token, or service. This post (which is a bit longish) describes how to use crypto as another payment mechanism. It would just add another tool to your PM trading toolbox.
TL;DR 2: This is not an exhaustive review – it’s a simplified how-to. Calling me out on certain minute aspects is useless. However, if I made a mistake, or omitted something important PLEAESE correct me.
TL;DR 3: I’ll describe everything in chapters, so as you go down, if you feel this is irrelevant to you, you can stop without spending too much time reading it all.

Chapter 1: Why use crypto

  1. You control the entire transaction, end to end. You do not need a third party (Like PayPal or Google) telling you what you’re allowed to sell, and for how much. You do not need to resort to subterfuge (“use Friends & Family, and make sure to leave no notes!”).
  2. Crypto transactions add a level of privacy (depending on how you use them).
  3. Transactions are secure (read more about blockchain technology), and usually only involve you sharing your crypto address with your counterpart.
  4. Transactions are irreversible – good if you’re an established seller who’s afraid of chargebacks by scammers.
  5. Yet transactions can still be proven – they’re out there on the blockchain, available for all to see.
  6. Most of the time, transactions are fast (depending on network traffic and amount of gas paid).

Chapter 2: Types of crypto

I’m not going to go into technicalities, and definitely not recommend anything. Let’s just split the crypto world right now into 2 types of coins: stable, and unstable.
  1. Unstable coins (Bitcoin, Ether, Ripple etc.) can see their fiat value go up or down several times a minute. They’re volatile, and while they can be used to pay, the buyer and seller need to agree on the spot, convert fiat to the coin and start the transaction – at the end of which, the fiat value received may be higher or lower than when the transfer started. Because of that, I’ll avoid discussing them here.
  2. Stable coins usually run on the Ethereum blockchain, and use a technology called “smart contract” to attach their value to fiat. A stable coin like USDC, DAI, USDT etc. will always be worth $1 (give or take 1% at certain times). For all intents and purposes, if I quote you a price of $250 and you send me 250 USDC – we’re done.

Chapter 3: what do I need to have to trade in stable coins?

  1. An address – your crypto address allows you to control crypto on the blockchain. More specifically, it allows you to withdraw funds (since everyone can deposit to your address, whether you want it or not).
  2. A crypto wallet. A wallet is NOT where you hold your coins! Your “money” is on the blockchain, assigned to your address. Your wallet allows you to mange the coins in that address. You can either use one of the free wallets out there, or have one provided to you by an exchange. I recommend MetaMask. It runs as a browser extension (Chrome, Firefox, Brave) or a mobile app. Make sure you do your due diligence before selecting a wallet, so you wont use a scammy app, that will use your pass phrase to clean up your address!
  3. Some Ether (usually 0.05-0.1 ether is enough for several transactions) – every transfer on the blockchain has a fee, representing compensation for the computer work done to transfer funds from address to address. This fee, known as “gas” can go from fractions of a cent to several dollars – depending on the blockchain traffic at the time. You can control the amount of gas, and price of gas for your transactions, but generally speaking: the less you pay, the slower the transfer. Gas is paid in Ether only, so you need some in your wallet (see below on how to get it).
  4. If you want to sell using crypto – you’re done!
  5. If you want to buy using Crypto, you’ll need to convert some fiat to stable coins – see next chapter.

Chapter 4: Quickest way to get stable coins

The easiest way to start (in the US – your miles/kilometres may vary elsewhere) is to open a Coinbase account.
(Disclaimer: you can choose any other exchange. I’m not compensated by Coinbase, I have no stake in Coinbase, I don’t work there, or know anyone who does. There’s a reason I mention them: they make this simple.)
While Coinbase is the fastest and easiest way to go for noobs, there are some caveats:
  1. Coinbase is a registered financial company. They require full KYC (i.e. photo of your driver’s license). Everything you do gets reported to the IRS, authorities, etc. But then, your bank does the same.
  2. Coinbase doesn’t care where the funds come and go – unless law enforcement, IRS, SEC etc tell them to care. If you’re privacy-oriented, an exchange is not for you, go to the next chapter.

Let’s look at the steps of using Coinbase, and how much they’ll cost you:

  1. Open Coinbase account (free)
  2. Go through KYC needed to connect a bank account to your Coinbase account (free)
  3. Transfer fiat to your account (free if bank transfer, otherwise credit/debit card fee applies)
  4. Convert fiat to the stable coin USDC (FREE! Since Coinbase “owns” USDC, they don’t charge anything to convert back and forth between USD and USDC. And it’s always 1-1 conversion.)
  5. Transfer USDC to an external wallet (yours, or a sellers) (FREE! Again, another perk – Coinbase pays your transfer gas fee).
  6. If you’re content with using Coinbase as your wallet, you are done!
a. When you want to buy, you ask the seller for his address, and transfer USDC to him (free).
b. When you want to sell, you give the user your Coinbase USDC address and he sends there (free again).
c. Make sure you send the right address – there are no backsies in crypto!!!

Using your own wallet:

  1. Install MetaMask. Follow instructions to create your address. Make sure you keep the pass phrase safe (NOT ON YOUR COMPUTER).
  2. Go through steps 1-5 to convert some fiat to USDC for free.
  3. Buy some ether – Currently Ether spot is about $230, meaning it’ll cost you about $10-20 to get some Ether + whatever fee Coinbase has on trading.
  4. Send the USDC to your new address.
  5. Send the Ether to your new address.
  6. You are now good to send and receive payments!
  7. When you receive USDC from a buyer, you can either keep them in your wallet for further use, or send to Coinbase, convert to fiat and send to your bank account. Always remember: on Coinbase 1 USDC == $1.

Chapter 5: Doing it on your own – for advanced users only

If you don’t like sharing all your info with Coinbase, you can definitely just install your own wallet (MetaMask is still the best option, IMHO, but there are many more), and fund it personally.
The biggest challenge you’ll face is: how do I convert fiat to crypto? Here are some options:
  1. The easiest: get someone to sell you some. Someone who already went through the whole process, and will agree to give you some crypto. Once you have crypto, you can easily convert it to any other crypto, without using any exchange, using crypto swap apps.
  2. The more expansive: use a service like Changelly (and there are others – again: I have no stake) to “buy” crypto. Take into account that they have fees. There are also services (like LocalBitcoins) that will allow you to buy directly from other people, for lower fees.
  3. You can use a different exchange, perhaps even one in a different country. Take into account that you’ll need to get actual money there, so at one point, someone will know something about you.
As said, once you have ANY crypto in your wallet, it’s easy to convert it to stable coins, Ether, or everything else you need.

Summary

I tried covering the basics of using crypto for payment. I did my best to avoid techy aspects and jargon.
Crypto is here to stay. Next (and current) generations will use it, like we’re using credit cards and PayPal. It will have no “magic” or “hoax” attached to it. It’s not “good” or “bad” – it’s just another way to convey value.
I was taught all this by someone. I’m sharing this with you now, in the hope you’ll share it with other people. That’s how knowledge grows.
If anyone wants any clarification, or expansion on any item, feel free to comment below, or reach out to me.
submitted by Niceguy955 to Silverbugs [link] [comments]

H.WRITERS TECH SERVICES🔥[H] Windows 10 / 8/ 8.1 all Pro/Home/N | Server 2019/2016/2012 | OFFICE 2019/2016/13/10 | Visio 2019/2016/13 | Project 2019/2016/13 | Office 365 Lifetime & Adobe! [W] Amazon Gift 🔥 Credit Cards 🔥 PayPal 🔥 Square Cash 🔥 Venmo & MUCH MORE🔥BULK DEALS

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Hello & Welcome ALL!!! I'm happy to have you here! replies are almost instant, I do strive to help you in everything you need therefore, If you haven't received the key(s) from me within 1 hour message me again to reminds me Don't forget to read important information at the end of this thread.
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Read the tables below for what you would like to purchase and click your payment method. Press Send in the opened page and you are done it is that easy! You will then be contacted shortly. Or Click here to message me about purchasing Servers/Project/Visio/Adobe/Autocad/Antivirus NEW PRODUCTS!!! NOW ACCEPTING ZELLE & APPLE PAY!!
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Office 2013 Pro Plus $35 Ask Credit/Debit Card Venmo BitCoin Amazon E-Gift Card PayPal Ether
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Office 2010 Pro Plus $25 Message
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Windows Server 2019 Essentials $45 Message
Project Professional 2013 $25 Message
Project Professional 2016 $30 Message
Project Professional 2019 $35 Message
Visio Professional 2013 $25 Message
Visio Professional 2016 $30 Message
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submitted by JohnSmithestine to microsoftsoftwareswap [link] [comments]

H.WRITERS TECH SERVICES🔥[H] Windows 10 / 8/ 8.1 all Pro/Home/N | Server 2019/2016/2012 | OFFICE 2019/2016/13/10 | Visio 2019/2016/13 | Project 2019/2016/13 | Office 365 Lifetime & Adobe! [W] Amazon Gift 🔥 Credit Cards 🔥 PayPal 🔥 Square Cash 🔥 Venmo & MUCH MORE🔥BULK DEALS

PAYMENT METHODS

Hello & Welcome ALL!!! I'm happy to have you here! replies are almost instant, I do strive to help you in everything you need therefore, If you haven't received the key(s) from me within 1 hour message me again to reminds me Don't forget to read important information at the end of this thread.
HOW TO PURCHASE
Read the tables below for what you would like to purchase and click your payment method. Press Send in the opened page and you are done it is that easy! You will then be contacted shortly. Or Click here to message me about purchasing Servers/Project/Visio/Adobe/Autocad/Antivirus NEW PRODUCTS!!! NOW ACCEPTING ZELLE & APPLE PAY!!
Adobe Price Download CC /Debit Venmo Bitcoin Amazon-ecard PayPal Ether Square Cash
Adobe Creative Cloud 1yr Key All Apps $175 [Download](creative.adobe.com/redeem) Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Win_10 Price Download CC /Debit Venmo Bitcoin Amazon-ecard PayPal Ether Square Cash
Windows 10 Home $40 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Windows 10 Pro $45 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Windows 10 Pro N $35 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Windows 10 Edu $25 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Windows 10 Home N $25 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Windows 10 Enterprise $50 32/64Bit Download Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Win_8.1 Price Download CC /Debit Venmo Bitcoin Amazon-ecard PayPal Ether Square Cash
Windows 8.1 Pro $30 32bit/64bit Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
MS_Office Price Download CC /Debit Venmo Bitcoin Amazon-ecard PayPal Ether Square Cash
Office 2013 Pro Plus $35 Ask Credit/Debit Card Venmo BitCoin Amazon E-Gift Card PayPal Ether
Office 2016 Pro Plus $50 Download Credit/Debit Card Venmo BitCoin Amazon E-Gift Card PayPal Ether Square Cash
Office 2019 Pro Plus $60 Download Credit/Debit Card Venmo BitCoin Amazon E-Gift Card PayPal Ether Square Cash
Office 2016 For Mac $50 Download Credit/Debit Venmo BitCoin Amazon E-Gift Card PayPal Ether Square Cash
Office 2019 For Mac $70 Download Credit/Debit Venmo BitCoin Amazon E-Gift Card PayPal Ether Square Cash
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Windows Server 2016 $35 Ask Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
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Windows Server 2019 Datacenter $55 Ask Credit/Debit Card Venmo Bitcoin Amazon E-Gift Card PayPal Ether Square Cash
Other_ Price Contact
Office 2010 Pro Plus $25 Message
Windows Server 2012 R2 Standard $25 Message
Windows Server 2012 R2 Datacener $30 Message
Windows Server 2012 R2 Essentials $20 Message
Windows Server 2016 Essentials $30 Message
Windows Server 2016 Datacenter $40 Message
Windows Server 2019 Essentials $45 Message
Project Professional 2013 $25 Message
Project Professional 2016 $30 Message
Project Professional 2019 $35 Message
Visio Professional 2013 $25 Message
Visio Professional 2016 $30 Message
Visio Professional 2019 $35 Message
Office 365 Lifetime Account $250 Message
AutoDesk ask Message
Adobe CS6 ask Message
submitted by JohnSmithestine to microsoftsoftwareswap [link] [comments]

Thank you all. I upgraded.

So I had another post asking about exchanging BTC for MCO to reach the higher tier card. I have the royal indigo card, decided to take advantage of the icy white card right now since CDC seems to be doing well, has progressive plans, and the potential for MCO to rise again is likely in my opinion (almost $20 in 2017-2018!). Anyway, I am in the USA and don’t have access to syndicate.
At first I had the cringe of selling my bitcoin for something else. But thought, hey if I plan this right, I’ll come out better in the long term since I’m planning to stay in crypto for the long term, possibly forever if BTC does well. I spent days and hours on end thinking if I should really convert my 2.5 BTC to get the 4500 MCO goal to get the icy white card. I spend about $1-2K a month on the royal indigo card. I also continuously buy bitcoin weekly since I reached my personal comfortable bitcoin position. I’m not a trader, just a hodler.
I’m looking forward to MCO increasing in price value and also CDC possibly changing up the benefits to make it more attractive. That extra 2% will probably make a noticeable difference with my holdings. I’ll probably have to report this action in USA taxes, but cryptotrader.tax should help with that. :)
At first, I was thinking, WTF am I doing buy getting an icy white card and giving up 2.5 BTC? Then I thought, long term wise, I believe in the company, and I plan on using ALL the MCO interest I gain from my holdings and from the 5K MCO stake into BTC while dollar cost averaging weekly. Even after the upgrade last night to the 5K MCO tier, I felt like “did I just do what most people wouldn’t? Did I just sell my bitcoin for MCO (yes of course), am I doing the “right” thing? Anyway, the transaction already happened and already requested for the icy white card. The more I have been analyzing the potential with the icy white card and reading reviews in other subreddit posts from other people, it seems like the most reasonable investment to take advantage of the higher interest rates and 4% cash back for someone who can afford to get the 5K MCO tier NOW as an early adopter and investor of crypto.com’s space. Soon, when more of these cards get distributed throughout the world, MCO’s supply may decrease further and the price of them could possibly increase a bit I think.
After making this transaction, I felt buyers remorse. Then when thinking of the long term, I felt better about it knowing if at any time I don’t feel the icy white is worth my time, I can always downgrade back to 500MCO tier. But with the added benefits of crypto.com private to include priority customer service and the inheritance service. I’m not sure how good the research product will be and the crypto invest thing, not sure if I’ll be using that since all I want is more BTC. I got a good/comfortable ETH position for profits in the long term future, but ultimately I think I’m a semi-bitcoin maximalist in a small way.
I want to thank ALL of you for responding to my posts in great, professional ways. You guys are the reason why I keep coming back to this subreddit. I took that risk of risking my 2.5 BTC for 5K MCO to get this card to reap the benefits and the better EARN rates. Although the crypto.com private benefits appear cool (gonna wait for their swag too), the better interest rates of 4% cash back and 2% extra in EARN, is the main things that attracted me because of my crypto position as a HODLER and long term investor. If this company keeps going, I believe long term, MCO will do me well to allow me to accumulate more bitcoin for the long term and also take advantage of higher tier EARN rates.
I’m hoping the benefits for 5K MCO icy white card tier holders will improve over time. What do you think? Anyway, thank you all again and keep accumulating that BTC!
Not financial advice!
submitted by Captmedu74 to Crypto_com [link] [comments]

The Truth about Bitcoin?

Part 1/4 - NSA Connection:
First off, the SHA-256 algorithm, which stands for Secure Hash Algorithm 256, is a member of the SHA-2 cryptographic hash functions designed by the NSA and first published in 2001.
SHA-256, like other hash functions, takes any input and produces an output (often called a hash) of fixed length. The output of a hashing algorithm such as SHA-256 will always be the same length - regardless of the input size. Specifically, the output is, as the name suggests, 256 bits.
Moreover, all outputs appear completely random and offer no information about the input that created it.
The Bitcoin Network utilises the SHA-256 algorithm for mining and the creation of new addresses.
Who is Satoshi Nakamoto? What does Satoshi Nakamoto mean?
Out of respect for their anonymity, it would be rude to speculate in a video about who Satoshi Nakamoto is likely to be. The reality is, it's not important. Let me explain: Any human being can be attacked. Jesus could come back from the dead, and there would be haters. Therefore, the Satoshi Nakamoto approach neutralises the natural human herd behaviour, exacerbated by the media, to attack and discredit. This is a very important part of Bitcoin's success thus far. Also, from a security perspective, those who wish to dox Satoshi Nakamoto in a video are essentially putting his, or her, or their, life at risk...for the sake of views.
As a genius who has produced an innovation not just from a technical perspective but also a monetary perspective, they should be treated with more respect than that.
As for the name Satoshi Nakamoto, I would speculate that it is a homage to Tatsuaki Okamoto and Satoshi Obana - two cryptographers from Japan. There is another reason for the name, but that...is confidential.
In 1996, the NSA's Cryptology Division of their Office of Information Security Research and Technology published a paper titled: "How to make a mint: The cryptography of anonymous electronic cash", first publishing it in an MIT mailing list and later, in 1997, in the American University Law Review. One of the researchers they referenced was Tatsuaki Okamoto.

Part 2/4 - 'Crypto Market':
Most of the crypto market is a scam.
By the way, this was predicted very early on in the Bitcoin Talk forums - check out this interaction from November 8th, 2010:
"if bitcoin really takes off I can see lots of get-rich-quick imitators coming on the scene: gitcoin, nitcoin, witcoin, titcoin, shitcoin...
Of course the cheap imitators will disappear as quickly as those 1990s "internet currencies", but lots of people will get burned along the way."
To which Bitcoin OG Gavin Andresen replies:
"I agree - we're in the Wild West days of open-source currency. I expect people will get burned by scams, imitators, ponzi schemes and price bubbles."
"I don't think there's a whole lot that can be done about scammers, imitators and ponzi schemes besides warning people to be careful with their money (whether dollars, euros or bitcoins)."
Now, on the one hand, lack of regulation is more meritocratic (as you don't have to be an accredited investor just to get access).
On the other hand, it means that crypto is, as Gavin said, a Wild West environment, with many cowboys in the Desert. Be careful.
This is the same with most online courses - particularly 'How to get rich quick' courses - however with crypto you have an exponential increase in the supply of victims during the bull cycles so it is particularly prevalent during those times.
In addition to this, leverage trading exchanges, which are no different to casinos, prey on naive retail traders who:
A) Think they can outsmart professional traders with actual risk management skills; and
B) Think they can outsmart the exchanges themselves who have an informational advantage as well as an incentive to chase stop losses and liquidate positions.

Part 3/4 - CBDCs:
The Fed and Central Banks around the world have printed themselves into a corner.
Quantitative easing was the band-aid for the Great Financial Crisis in 2008, and more recent events have propelled the rate of money printing to absurd levels.
This means that all currencies are in a race to zero - and it becomes a game of who can print more fiat faster.
The powers that be know that this fiat frenzy is unsustainable, and that more and more people are becoming aware that it is a debt based system, based on nothing.
The monetary system devised by bankers, for bankers, in 1913 on Jekyll Island and supercharged in 1971 is fairly archaic and also does not allow for meritocratic value transfer - fiat printing itself increases inequality.
They, obviously, know this (as it is by design).
The issue (for them) is that more and more people are starting to become aware of this.
Moving to a modernised monetary system will allow those who have rigged the rules of the game for the last Century to get away scot-free.
It will also pave the way for a new wealthy, and more tech literate, elite to emerge - again predicted in the Bitcoin Talk forums.
Now...back to the powers that be.
Bitcoin provides a natural transition to Central Bank Digital Currencies (CBDCs) and what I would describe as Finance 2.0, but what are the benefits of CBDCs for the state?
More control, easier tax collection, more flexibility in monetary policy (i.e. negative interest rates) and generally a more efficient monetary system.
This leads us to the kicker: which is the war on cash. The cashless society was a fantasy just a few years ago, however now it doesn't seem so far fetched. No comment.

Part 4/4 - Bitcoin:
What about Bitcoin?
Well, Bitcoin has incredibly strong network effects; it is the most powerful computer network in the World.
But what about Bitcoin's reputation?
Bankers hate it.
Warren Buffett hates it.
Precisely, and the public hates bankers.
Sure, the investing public respects Buffett, but the general public perception of anyone worth $73 billion is not exactly at all time highs right now amid record wealth inequality.
In the grand scheme of things, the market cap of Bitcoin is currently around $179 billion.
For example, the market cap of Gold is around $9 trillion, which is 50x the Market Cap of Bitcoin.
Money has certain characteristics.
In my opinion, what makes Bitcoin unique is the fact that it has a finite total supply (21 million) and a predictable supply schedule via the halving events every 4 years, which cut in half the rate at which new Bitcoin is released into circulation.
Clearly, with these properties, it seems likely that Bitcoin could act as a meaningful hedge against inflation.
One of the key strengths of Bitcoin is the fact that the Network is decentralised...
Many people don't know that PayPal originally wanted to create a global currency similar to crypto.
Overall, a speculative thesis would be the following:
Satoshi Nakamoto is one of the most important entities of the 21st Century, and will accelerate the next transition of the human race.
Trusted third parties are security holes.
Bitcoin is the catalyst for Finance 2.0, whereby value transfer is conducted in a more meritocratic and decentralised fashion.
In 1964, Russian astrophysicist Nikolai Kardashev designed the Kardashev Scale.
At the time, he was looking for signs of extraterrestrial life within cosmic signals.
The Scale has three categories, which are based on the amount of usable energy a civilisation has at its disposal, and the degree of space colonisation.
Generally, a Type 1 Civilisation has achieved mastery of its home planet (10^16W);
A Type 2 Civilisation has mastery over its solar system (10^26W);
and a Type 3 Civilisation has mastery over its Galaxy (10^36W).
We humans are a Type 0 Civilisation on this Scale.
Nonetheless, our exponential technological growth in the few decades indicates that we are somewhere between Type 0 and Type 1.
In fact, according to Carl Sagan's interpolated Kardashev Scale and recent global energy consumption, we are about 0.73.
Physicist Freeman Dyson estimated that within 200 years or so, we should attain Type 1 status.
As a technology that, through its decentralisation, links entities globally and makes value transfer between humans more efficient, Bitcoin could prove a key piece of our progression as a civilisation.
What are your thoughts?
Is it true...or false?
https://www.youtube.com/watch?v=1oQLOqpP1ZM
submitted by financeoptimum to conspiracy [link] [comments]

Cameron and Tyler Winklevoss Gemini brothers: Exchange ... Top Best Cryptocurrency Exchanges in 2019 Cameron and Tyler Winklevoss Gemini brothers: Exchange ... Best Crypto Exchange- ZERO FEES HACK Gemini Exchange Cameron and Tyler Winklevoss: Blockchain ...

There are many crypto exchanges online, but not all of them are good for buying Bitcoin and Altcoins. You might’ve made a nice list of Altcoins (Alternate Cryptocurrencies) to invest in, but the problem that is still giving you headache is finding the best crypto exchange for buying, or swapping Bitcoin for these Altcoins. Different exchanges offer a unique range alternative digital currencies and Bitcoin combinations as well as payment options and minimum bids. Crypto exchanges are also operational dependent on regional and territorial regulations and restrictions, so it is best to check your preferred currency combinations by country.eToro Coinmama is another beginner-friendly cryptocurrency brokerage that focuses on credit and debit card purchases.. They offer instant delivery and sell Bitcoin, Ethereum, Ripple, Litecoin, and more to 40 US States, and most countries. Coinmama doesn’t provide its users with a wallet on the exchange. Instead, users are asked to provide a wallet address to send the purchased cryptocurrency to. Bitcoin Exchanges. Places to buy bitcoin in exchange for other currencies. Note: Exchanges provide highly varying degrees of safety, security, privacy, and control over your funds and information. Perform your own due diligence and choose a wallet where you will keep your bitcoin before selecting an exchange. Below, we’ll examine some of the most important digital currencies other than bitcoin. First, though, a caveat: it is impossible for a list like this to be entirely comprehensive.

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Cameron and Tyler Winklevoss Gemini brothers: Exchange ...

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