What Is Bitcoin
Last updated: 04-09-2019
To cut through some of the confusion surrounding bitcoin, we need to separate it into two components. On the one hand, you have bitcoin-the-token, a snippet of code that represents ownership of a digital concept – sort of like a virtual IOU. On the other hand, you have bitcoin-the-protocol, a distributed network that maintains a ledger of balances of bitcoin-the-token. Both are referred to as “bitcoin.”
The system enables payments to be sent between users without passing through a central authority, such as a bank or payment gateway. It is created and held electronically. Bitcoins aren’t printed, like dollars or euros – they’re produced by computers all around the world, using free software.
It was the first example of what we today call cryptocurrencies, a growing asset class that shares some characteristics of traditional currencies, with verification based on cryptography.
Who created it?
A pseudonymous software developer going by the name of Satoshi Nakamoto proposed bitcoin in 2008, as an electronic payment system based on mathematical proof. The idea was to produce a means of exchange, independent of any central authority, that could be transferred electronically in a secure, verifiable and immutable way.
To this day, no-one knows who Satoshi Nakamoto really is.
In what ways is it different from traditional currencies?
Bitcoin can be used to pay for things electronically, if both parties are willing. In that sense, it’s like conventional dollars, euros, or yen, which are also traded digitally.
But it differs from fiat digital currencies in several important ways:
1 – Decentralization
Bitcoin’s most important characteristic is that it is decentralized. No single institution controls the bitcoin network. It is maintained by a group of volunteer coders, and run by an open network of dedicated computers spread around the world. This attracts individuals and groups that are uncomfortable with the control that banks or government institutions have over their money.
Bitcoin solves the “double spending problem” of electronic currencies (in which digital assets can easily be copied and re-used) through an ingenious combination of cryptography and economic incentives. In electronic fiat currencies, this function is fulfilled by banks, which gives them control over the traditional system. With bitcoin, the integrity of the transactions is maintained by a distributed and open network, owned by no-one.
2 – Limited supply
Fiat currencies (dollars, euros, yen, etc.) have an unlimited supply – central banks can issue as many as they want, and can attempt to manipulate a currency’s value relative to others. Holders of the currency (and especially citizens with little alternative) bear the cost.
With bitcoin, on the other hand, the supply is tightly controlled by the underlying algorithm. A small number of new bitcoins trickle out every hour, and will continue to do so at a diminishing rate until a maximum of 21 million has been reached. This makes bitcoin more attractive as an asset – in theory, if demand grows and the supply remains the same, the value will increase.
3 – Pseudonymity
While senders of traditional electronic payments are usually identified (for verification purposes, and to comply with anti-money laundering and other legislation), users of bitcoin in theory operate in semi-anonymity. Since there is no central “validator,” users do not need to identify themselves when sending bitcoin to another user. When a transaction request is submitted, the protocol checks all previous transactions to confirm that the sender has the necessary bitcoin as well as the authority to send them. The system does not need to know his or her identity.
In practice, each user is identified by the address of his or her wallet. Transactions can, with some effort, be tracked this way. Also, law enforcement has developed methods to identify users if necessary.
Furthermore, most exchanges are required by law to perform identity checks on their customers before they are allowed to buy or sell bitcoin, facilitating another way that bitcoin usage can be tracked. Since the network is transparent, the progress of a particular transaction is visible to all.
This makes bitcoin not an ideal currency for criminals, terrorists or money-launderers.
4 – Immutability
Bitcoin transactions cannot be reversed, unlike electronic fiat transactions.
This is because there is no central “adjudicator” that can say “ok, return the money.” If a transaction is recorded on the network, and if more than an hour has passed, it is impossible to modify.
While this may disquiet some, it does mean that any transaction on the bitcoin network cannot be tampered with.
5 – Divisibility
The smallest unit of a bitcoin is called a satoshi. It is one hundred millionth of a bitcoin (0.00000001) – at today’s prices, about one hundredth of a cent. This could conceivably enable microtransactions that traditional electronic money cannot
- What is Bitcoin? It's a decentralized digital currency
- Why Use Bitcoin? It's fast, cheap to use, and secure
- How Can I Buy Bitcoin? From an exchange or an individual
- How to Buy Bitcoin in the UK Buying bitcoin in the UK
- How to Store Your Bitcoin Use a digital or paper wallet
- What Can You Buy with Bitcoin? Spend your bitcoins
- How to Sell Bitcoin A guide on how to sell your bitcoins
- How to Accept Bitcoin Payments for Your StoreLearn about bitcoin POS systems
- How do Bitcoin Transactions Work? Bitcoin addresses and private keys
- Is Bitcoin Legal? The current regulation around bitcoin
- Who is Satoshi Nakamoto? The founder of bitcoin
- Understanding Bitcoin Price Charts A primer on bitcoin price charts
- How Bitcoin Mining Works By confirming transactions
- How to Set Up a Bitcoin Miner Generate bitcoins yourself
- What are Bitcoin Mining Pools? What are pools how and how to join them?
- How Does Cloud Mining Bitcoin Work? Alternative bitcoin mining solutions
- How to Calculate Mining Profitability Can you make a ROI?
- How to Make a Paper Bitcoin Wallet Creating an unhackable bitcoin wallet
- Can Bitcoin Scale? A look at the debate and the tech
- What is SegWit? A new way of storing transaction data
- What is Bitcoin's Lightning Network? Off-chain transaction channels
- What is Ethereum? A blockchain application platform and 'world computer'
- What is Ether? The 'fuel' of the ethereum network
- How to Use Ethereum Wallets, trading and ‘dapps’
- Who Created Ethereum? Vitalik Buterin
- How Ethereum Works'Turing-complete' programming, 'state' and the 'EVM'
- How Ethereum Mining Works 'Proof of Work' and 'Proof of Stake'
- How to Mine Ethereum GPUs, mining software and pools
- How Will Ethereum Scale? ‘Sharding’ and ‘off-chain’ transactions
- How Do Ethereum Smart Contracts Work? Code, transaction fees and 'gas'
- What is Bitcoin Cash?Same blockchain, different characteristics.
- Hard Fork vs Soft ForkWhy and how do blockchains split?
- What is the Difference Between Litecoin and Bitcoin? It's the silver to bitcoin's gold
- How to Buy Litecoin How to buy the bitcoin alternative litecoin
- How to Mine Litecoin and other Altcoins How to generate your own altcoins
- What is Ripple?Is it a token? Is it a payments platform?
- What is Blockchain Technology? A system of distributed data and logic
- How Does Blockchain Technology Work? Cryptographic keys, distributed networks and network servicing protocols
- What Can a Blockchain Do?Identity, record keeping, smart contracts and more
- What is a Distributed Ledger? A dynamic, independently maintained database
- What is the Difference Between Public and Permissioned Blockchains? Can anyone read or write to the ledger?
- What is the Difference Between a Blockchain and a Database? It begins with architectural and administrative decisions
- What Are the Applications and Use Cases of Blockchains? Tokenization, auditing, governance, settlement and more
- How Could Blockchain Technology Change Finance? Cross-border payments, new asset classes, regulatory compliance and more
- What are Blockchain's Issues and Limitations? Complexity, size, costs, speed, security, politics and more
- Why Use a Blockchain? To manage and secure digital relationships as part of a system of record
- What is a Decentralized Application? A distributed 'smart contract' system
- What is a DAO? A 'decentralized autonomous organization'
- What is an ICO? Initial Coin Offerings refer to the distribution of digital tokens.
- What is Dash? (DASH)
- What is Stellar? (XLM)
- What is Filecoin? (FIL)
- What is EOS?
- What is Grin?
- What is Zilliqa? (ZIL)
- What is Cardano? (ADA)
- What is 0x? (ZRX)
- What is Decentraland? (MANA)
- What is XRP?
- What is Litecoin?
- What is Binance Coin (BNB)?
- Who is Jed McCaleb?
- Who is Coinbase CEO Brian Armstrong?
- What is Bakkt?
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