What it actually is
Bitcoin is a ledger maintained by a network of computers that agree on its contents through proof of work. Owning bitcoin means controlling a private key that authorises spending from an address. There is no company, no share, no claim on anything, and no one to sue.
Supply is capped at 21 million by the protocol rules, issued on a schedule that halves roughly every four years. That fixed supply is the entire monetary argument for it, and it is genuinely novel — no previous asset has had a credibly unchangeable issuance schedule.
Valuation is the open question
Equities have earnings, bonds have coupons, property has rent, commodities have industrial use. Bitcoin has none of these. Its price is determined purely by what the marginal buyer will pay, which makes conventional valuation impossible and leaves the field to narrative, flows and reflexivity.
This cuts both ways and honest analysis should say so. There is no fundamental floor. There is also no earnings disappointment, no covenant breach and no dilution.
Custody is the real decision
"Not your keys, not your coins" is a cliché because it keeps being proved. Mt. Gox, QuadrigaCX, Celsius and FTX all lost customer assets. Holding on an exchange means holding a claim on that exchange, which in an insolvency may rank as an unsecured creditor claim.
Self-custody removes counterparty risk and replaces it with operational risk: lose the seed phrase and the asset is permanently gone. There is no password reset and no recovery. A meaningful fraction of all bitcoin is believed to be irretrievably lost this way.
The UK regulatory position
The FCA has banned the sale of crypto derivatives and ETNs to retail consumers since 2021 — though it has consulted on relaxing the ETN element. Crypto firms serving UK customers must register with the FCA for anti-money-laundering supervision, which is emphatically not the same as being regulated for conduct. Crypto holdings are outside the FSCS. Financial promotions rules now apply, requiring risk warnings and a cooling-off period for new customers.
Disposals are subject to capital gains tax, and HMRC treats crypto-to-crypto trades as disposals — a point that generates a great many unexpected tax bills.
How you would actually trade it
Use an FCA-registered exchange, complete identity verification, and move anything you intend to hold long term into self-custody — a hardware wallet with the recovery phrase written down, stored physically, in more than one place, never photographed and never typed into anything.
Test the recovery process with a small amount before trusting it with a large one. Verify receiving addresses character by character; address-swapping malware is common and transactions cannot be reversed.
Keep records of every transaction, including crypto-to-crypto, from the start. Reconstructing years of trades for a tax return is genuinely painful.
What goes wrong
- Drawdowns exceeding 70% have occurred repeatedly, in 2011, 2014, 2018 and 2022.
- Irreversible loss. Wrong address, lost key, or a convincing phishing site, and it is gone permanently.
- No FSCS, no ombudsman, no recourse. Exchange failure means joining a creditor queue.
- Fraud density is extremely high across the wider sector, and recovery-scam operators specifically target people who have already lost money.
- Regulatory change can alter access, taxation and institutional demand rapidly.
- No valuation anchor. Price is entirely a function of belief, and belief is not a floor.
This entry describes how a market works. It is not a recommendation, a price forecast, or advice about whether this belongs anywhere near your money. How entries are written.