What is Bitcoin? Key cryptocurrency terms and what they mean (2024)

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What is Bitcoin? Key cryptocurrency terms and what they mean (1)Image source, Getty Images: We Are

By Brandon Drenon, Joe Tidy & Liv McMahon

BBC News

After Bitcoin briefly banked a new all time high price on 5 March, the sticky subject of cryptocurrencies has been thrust back into the spotlight.

But key terms associated with crypto such as blockchains, wallets - and more recently "spot ETFs" - remain something of a mystery for many.

But worry not.

If you're hearing these for the first time, or just need a refresher, here are a few key words and what they mean.

Bitcoin

While many may struggle with the finer points of crypto, pretty much everyone has heard of its most famous product: Bitcoin. But what actually is it?

Bitcoin is a cryptocurrency, which is to say a type of digital currency. Unlike traditional currencies - the dollar or pound, for example - Bitcoin is not backed or controlled by centralised financial institutions. This makes it popular for people who think decentralisation can bring financial freedom, but it also makes it extremely volatile - rising and falling in value at the whim of Bitcoin buyers and sellers.

Throughout February 2024, its price rose rapidly and it briefly reached a new record high - great news for those who have Bitcoin. But its value can plummet just as quickly as it spikes - a pattern which has been repeated multiple times since the cryptocurrency was launched.

Blockchain

Blockchain is the technology underpinning all cryptocurrencies, and many related products like non fungible tokens (NFTs). In essence, it is a virtual spreadsheet on which all the buying and selling of crypto is recorded. They are arranged in blocks linked together in a giant chain - hence the name.

Every cryptocurrency transaction is individually recorded onto the blockchain by a huge network of volunteers verifying its authenticity by using computer programmes. The incentive to do this for Bitcoin's network is that the first person to validate transactions is rewarded in Bitcoin. This potentially lucrative process, known as mining, is also controversial because of the incredible amount of energy used as people the world over race to be the first to successfully update the blockchain.

This also brings us on to "halving". The amount of Bitcoins that can be mined is capped at 21 million. And most of them are already in circulation. But roughly every four years, the number of Bitcoins rewarded to those who successfully create new blocks of the cryptocurrency is cut in half. The next Bitcoin "halving" (or "halvening") event is expected to take place in spring 2024.

Exchange-traded funds (ETFs)

ETFs are portfolios that let investors bet on multiple assets without having to buy any themselves. Traded on stock exchanges like shares, their value depends on how the overall portfolio performs in real time. They can comprise a combination of gold and silver bullion, for example, or a mix of shares in both technology and insurance companies.

A spot Bitcoin ETF buys the cryptocurrency directly, "on the spot", at its current price, throughout the day. While some ETFs already contained Bitcoin indirectly, the US approved several spot Bitcoin ETFs in January 2024. This allowed new investors, such as investment management firms like Blackrock and Fidelity, to enter the speculative world of Bitcoin without having to worry about digital wallets or navigating crypto exchanges.

  • How big banks are becoming 'Bitcoin whales'

Crypto Exchange

A crypto exchange is the digital platform where investors can buy, sell and trade cryptocurrencies. Similar to traditional investing, a crypto exchange acts as a brokerage where people can transfer traditional money, like pounds or dollars, from their banks into cryptocurrencies like Bitcoin or Ethereum. Most transactions are accompanied by fees.

Crypto Wallet

A crypto wallet is a place where investors hold their cryptocurrency. It stores the virtual assets much like a traditional wallet holds cash. There are two types, a hot wallet and a cold wallet. Hot wallets are connected to the internet, and thus more accessible for quick transfers and easy access. Cold wallets are physical devices like specially designed USBs that store crypto offline typically for safer and longer term storage.

Ethereum

Ethereum is used to describe both the second largest cryptocurrency after Bitcoin, represented by the Ether token, and the blockchain underpinning it. This supports an array of different applications and digital assets, such as non-fungible tokens. It functions in a similar way to Bitcoin and other cryptocurrencies, but in 2022 switched to a greener operating system requiring less computers and energy.

  • What are NFTs and why are some worth millions?

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  • Bitcoin
  • Cryptocurrency

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What is Bitcoin? Key cryptocurrency terms and what they mean (2024)

FAQs

What is Bitcoin in simple terms? ›

Bitcoin is a form of digital currency that aims to eliminate the need for central authorities such as banks or governments. Instead, Bitcoin uses blockchain technology to support peer-to-peer transactions between users on a decentralized network.

What is the Bitcoin key? ›

A private key is a secure code that enables the holder to make cryptocurrency transactions and prove ownership of their holdings. Bitcoin keys specifically feature a 256-bit string displayed as a combination of letters and numbers.

What is the meaning of Bitcoin in cryptocurrency? ›

Bitcoin mining is a network-wide competition to generate a cryptographic solution that matches specific criteria. When a correct solution is reached, a reward in the form of bitcoin and fees for the work done is given to the miner(s) who reached the solution first.

What is the key point of Bitcoin? ›

Bitcoin (BTC) is a cryptocurrency (a virtual currency) designed to act as money and a form of payment outside the control of any one person, group, or entity. This removes the need for trusted third-party involvement (e.g., a mint or bank) in financial transactions.

Can I turn Bitcoin into cash? ›

‍A: Bitcoin ATMs allow you to sell Bitcoin in exchange for cash. You need to verify your identity, typically through a government-issued ID, phone number, and a picture. You then send Bitcoin to the ATM's wallet and receive cash equivalent. The transaction process can take around 10-20 minutes.

How do you explain Bitcoin to a beginner? ›

Bitcoin (BTC) is a decentralized digital currency, without a central bank or single administrator, that can be sent from user to user on the peer-to-peer Bitcoin network without the need for intermediaries. Investments in digital assets and Web3 companies are highly speculative and involve a high degree of risk.

How do I withdraw my bitcoin key? ›

To withdraw your bitcoin, your exchange must initiate a transaction on your behalf by utilizing their private key to transfer the bitcoin to your designated address. This transaction must be confirmed on the blockchain before the bitcoin becomes available.

How do I get my bitcoin key? ›

Tip: The bitcoin private key is just a number. You can pick your private keys randomly using just a coin, pencil, and paper: toss a coin 256 times and you have the binary digits of a random private key you can use in a bitcoin wallet. The public key can then be generated from the private key.

What happens if you lose your bitcoin key? ›

If a user loses their private key, they can no longer access the wallet to spend, withdraw, or transfer coins.

Who controls Bitcoin? ›

Bitcoin is not controlled by any single group or person. Instead, it is governed by multiple stakeholders — including developers, miners, and users. Developers write the code that makes Bitcoin run; miners validate transactions; and users put the software to work by trading, transacting, holding, and more.

How to get Bitcoin for free? ›

How to earn free cryptocurrency: 11 easy ways
  1. Sign up with an exchange. ...
  2. Crypto staking. ...
  3. Free NFTs. ...
  4. Learn and earn. ...
  5. Crypto savings account. ...
  6. Crypto lending. ...
  7. Get cash from a brokerage. ...
  8. Participate in an airdrop.
Jun 28, 2024

How does Bitcoin make you money? ›

Bitcoin makes money for investors through appreciation, the increase of an asset's market value. There's a lot going on behind the scenes in the Bitcoin network, so here's a detailed primer designed to help you further your understanding of this digital phenomenon.

What is the key of Bitcoin? ›

When you first buy cryptocurrency, you are issued two keys: a public key, which works like an email address (meaning you can safely share it with others, allowing you to send or receive funds), and a private key, which is typically a string of letters and numbers (and which is not to be shared with anyone).

What exactly is Bitcoin and how does it work? ›

Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin's creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.”

Why do people need Bitcoin? ›

Cryptocurrencies are a portrayal of a brand-new decentralization model for money. They also help to combat the monopoly of a currency and free money from control. No government organizations can set the worthiness of the coin or flow, and that crypto enthusiasts think makes cryptocurrencies secure and safe.

How do you explain Bitcoin to a child? ›

You can start by explaining to them that Bitcoin is a type of currency that exists only online. That means, unlike US dollar bills you'd get for your weekly allowance, there are no physical bills or coins associated with Bitcoin. It's 100% digital.

Can I buy house with Bitcoin? ›

Yes, it is. But there are some limitations. Several cryptocurrency payment processors allow you to pay your mortgage directly with crypto. These processors typically convert your crypto to fiat currency before sending it to your mortgage lender.

Who owns most of the bitcoins? ›

So, who are the top holders of BTC? According to the Bitcoin research and analysis firm River Intelligence, Satoshi Nakamoto, the anonymous creator behind Bitcoin, is listed as the top BTC holder as of 2024. The company notes that Satoshi Nakamoto holds about 1.1m BTC tokens in about 22,000 different addresses.

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