What Is Bitcoin?
Bitcoin is the world's first and largest cryptocurrency — a decentralised digital currency that operates without banks, governments, or intermediaries. Created in 2009 by the pseudonymous Satoshi Nakamoto, Bitcoin uses blockchain technology to record all transactions on a public, tamper-proof ledger.
There will only ever be 21 million bitcoins, making it a scarce digital asset. This fixed supply is one reason proponents call it "digital gold" — a potential store of value and hedge against inflation.
How Bitcoin Works
Understanding Bitcoin's basics:
- Blockchain — A decentralised ledger recording every Bitcoin transaction. Maintained by a global network of computers (nodes).
- Mining — Specialised computers solve complex mathematical puzzles to validate transactions and earn new bitcoins as rewards. This process secures the network.
- Wallets — Software or hardware that stores your private keys (the cryptographic proof of ownership). Your bitcoin isn't "in" the wallet — it's on the blockchain, and the wallet holds the keys to access it.
- Halving — Every four years, the mining reward is cut in half, reducing the rate of new bitcoin creation. The most recent halving occurred in April 2024.
How to Buy Bitcoin in the UK
UK investors can purchase Bitcoin through several channels:
- Cryptocurrency exchanges — Platforms like Coinbase, Kraken, and Bitstamp allow you to buy Bitcoin with GBP via bank transfer or debit card
- Crypto brokers/apps — eToro, Revolut, and other apps offer simplified Bitcoin buying, though some don't allow withdrawals to external wallets
- Bitcoin ETFs/ETNs — Exchange-traded products that track Bitcoin's price, available through standard stockbrokers within ISAs and SIPPs
- Peer-to-peer — Platforms connecting buyers and sellers directly, though with higher risk and less regulatory protection
Is Bitcoin a Good Investment?
Arguments for investing in Bitcoin:
- Fixed supply of 21 million creates scarcity in a world of monetary expansion
- Growing institutional adoption (BlackRock, Fidelity, and major banks now offer Bitcoin products)
- Network effects — as more people use and hold Bitcoin, its utility and value increase
- Potential portfolio diversifier — Bitcoin has shown low correlation with traditional assets during some periods
Arguments against:
- Extreme volatility — Bitcoin has historically dropped 50-80% during bear markets
- No intrinsic value — Unlike shares, Bitcoin produces no earnings, dividends, or cash flows
- Regulatory risk — Governments could impose restrictions that limit adoption or trading
- Environmental concerns — Bitcoin mining consumes significant electricity, though the industry is increasingly using renewable energy
- Competition — Other cryptocurrencies or central bank digital currencies (CBDCs) could reduce Bitcoin's dominance
Bitcoin and UK Tax
HMRC treats Bitcoin as property, not currency. Key tax rules:
- Capital Gains Tax applies when you sell, swap, or spend Bitcoin
- The annual CGT allowance is £3,000 (2025/26 tax year)
- Gains above the allowance are taxed at 10% (basic rate) or 20% (higher rate)
- If you receive Bitcoin as income (mining, salary, staking), it's subject to Income Tax
- You must keep detailed records of every transaction — date, amount, value in GBP
How Much Bitcoin Should You Own?
Most financial advisers who are open to crypto suggest allocating no more than 5-10% of your total investment portfolio to Bitcoin and other cryptocurrencies. This provides meaningful exposure to potential gains while limiting the impact of crypto's extreme volatility on your overall wealth.
Remember: cryptocurrency is not regulated by the FCA as a financial product and is not covered by the FSCS. Never invest more than you can afford to lose entirely.
