What Is Cryptocurrency? A Plain-English Guide for First-Time Investors
A plain-English explanation of cryptocurrency for UK investors. Learn what crypto is, how blockchain works, how to buy safely, and the risks involved.
James Thornton
Senior Financial Analyst
Key Takeaways
Cryptocurrency is a digital currency secured by cryptography and recorded on a decentralised ledger called a blockchain.
Bitcoin and Ethereum are the two largest cryptocurrencies by market capitalisation, but thousands of others exist.
Cryptocurrency is not regulated by the FCA for investment purposes and is not covered by the FSCS compensation scheme.
You can buy cryptocurrency through FCA-registered exchanges such as Coinbase and eToro.
Never invest more than you can afford to lose — crypto markets are extremely volatile.
What Is Cryptocurrency?
Cryptocurrency is a form of digital money that exists only electronically. Unlike pounds sterling or US dollars, it is not issued or controlled by any central bank or government. Instead, cryptocurrencies rely on a technology called blockchain to verify and record transactions.
The word "cryptocurrency" comes from "cryptography" — the mathematical techniques used to secure each transaction. This makes it extremely difficult to counterfeit or double-spend digital coins.
Since Bitcoin launched in 2009, the cryptocurrency market has grown to include thousands of different coins and tokens, with a combined market capitalisation that has at times exceeded £2 trillion.
How Does Blockchain Technology Work?
A blockchain is a distributed digital ledger shared across a network of computers. When someone sends cryptocurrency, the transaction is broadcast to the network, verified by multiple computers (called nodes), and then added to a "block" of transactions.
Each block is cryptographically linked to the previous one, forming a chain. This makes it virtually impossible to alter past transactions without changing every subsequent block — a task that would require controlling the majority of the network.
Why Does This Matter?
Blockchain removes the need for a trusted middleman like a bank. Transactions are peer-to-peer, transparent, and recorded permanently. This is why advocates describe cryptocurrency as "trustless" — you do not need to trust any single institution.
Bitcoin (BTC) — The original and largest cryptocurrency. Created by the pseudonymous Satoshi Nakamoto, Bitcoin is often described as "digital gold" due to its fixed supply of 21 million coins.
Ethereum (ETH) — The second-largest cryptocurrency. Ethereum introduced "smart contracts" — self-executing programs on the blockchain that enable decentralised applications (dApps).
Stablecoins — Cryptocurrencies pegged to fiat currencies like the US dollar. Examples include USDC and Tether (USDT). They aim to reduce volatility.
Altcoins — A catch-all term for any cryptocurrency other than Bitcoin. This includes Solana, Cardano, XRP, and thousands of smaller projects.
How to Buy Cryptocurrency in the UK
To purchase cryptocurrency legally in the UK, follow these steps:
1. Choose an FCA-registered exchange. The FCA maintains a register of crypto-asset firms approved for anti-money-laundering purposes. Check the register at register.fca.org.uk.
2. Verify your identity. All legitimate exchanges require ID verification (KYC) before you can trade.
3. Deposit funds. Most UK exchanges accept bank transfers and debit card payments.
4. Place your order. You can buy a fraction of a Bitcoin — you do not need to purchase a whole coin.
5. Store securely. Consider moving your crypto to a personal wallet rather than leaving it on an exchange.
Getting started with investing: building knowledge is the first step to success.
Is Cryptocurrency Regulated in the UK?
The FCA regulates crypto-asset firms for anti-money-laundering compliance. However, cryptocurrency itself is not regulated as a financial product. This means:
• You have no recourse to the Financial Ombudsman Service if something goes wrong.
• Your crypto holdings are not protected by the Financial Services Compensation Scheme (FSCS).
• The FCA has warned repeatedly that consumers should be prepared to lose all their money if they invest in crypto.
Risks of Investing in Cryptocurrency
Volatility: Crypto prices can swing 10-20% in a single day. Bitcoin lost over 60% of its value in 2022 before recovering in 2023-24.
Scams: The crypto space attracts fraudsters. Action Fraud reported over £300 million in cryptocurrency fraud losses in the UK in 2023.
No consumer protection: Unlike a stocks and shares ISA or bank deposit, there is no safety net if your exchange collapses or you lose access to your wallet.
Tax obligations: HMRC treats cryptocurrency as property. You may owe Capital Gains Tax when you sell, swap, or spend crypto above your annual allowance.
Risk Disclosure: Trading and investing carries significant risk. Your investments can fall as well as rise. Cryptocurrency is not FCA-regulated and not covered by FSCS. This is information only, not financial advice. Seek independent advice before investing.
The foreign exchange market is the world's largest financial market by trading volume.
Frequently Asked Questions
Is cryptocurrency legal in the UK?
Yes, buying and holding cryptocurrency is legal in the UK. However, crypto-asset firms must be registered with the FCA for anti-money-laundering purposes. The FCA does not regulate crypto as an investment product.
How much money do I need to start investing in crypto?
You can start with as little as £10 on most exchanges. You do not need to buy a whole Bitcoin — you can purchase a fraction. However, never invest more than you can afford to lose entirely.
Is cryptocurrency a good investment?
Cryptocurrency is a high-risk, speculative asset. While some investors have made significant returns, many have also suffered substantial losses. The FCA warns that consumers should be prepared to lose all their money.
Do I have to pay tax on cryptocurrency in the UK?
Yes. HMRC treats crypto as property. You may owe Capital Gains Tax when you sell, swap, or gift crypto. You have an annual CGT allowance (currently £3,000), after which gains are taxed at 10% or 20% depending on your income bracket.
What is the safest way to store cryptocurrency?
Hardware wallets (cold wallets) such as Ledger and Trezor are considered the safest option. They store your private keys offline, making them immune to online hacking. Never share your seed phrase with anyone.
Can I lose all my money in crypto?
Yes. Cryptocurrency values can drop to zero, exchanges can collapse (as seen with FTX in 2022), and scams can result in total loss. There is no FSCS protection for crypto holdings.
Advertisement. Your capital is at risk when trading. Not financial advice.
Risk Warning: Trading and investing carries significant risk. Your investments can fall as well as rise. CFDs carry high risk of rapid loss due to leverage. Cryptocurrency is not FCA-regulated and not covered by FSCS. This is information only, not financial advice. Seek independent advice before investing.
