How to Buy Bitcoin

You do not need a whole bitcoin. That one misunderstanding stops more people than any fee or forgotten password ever has. A bitcoin splits into 100 million smaller units called satoshis, so 20 pounds buys you a real slice, recorded on the same network as everyone else's. Whole coins are for headlines.

This is a how-to, not financial advice. Bitcoin's price moves, sometimes hard, and that is volatility, the one feature you cannot switch off. Nobody here is predicting where it goes. The job is narrower: get your money into bitcoin without a beginner mistake that costs you.

What you are actually buying

Start with the thing itself. It shapes every choice after. You are not buying a coin that sits in a drawer. You are buying an entry on a shared ledger that says these satoshis answer to your keys, and nobody else's.

That ledger has run since the first block was mined on 3 January 2009. Buried in it is a line of newspaper text: "Chancellor on brink of second bailout for banks." The block is still there, at the bottom of the chain, and everything you ever buy traces back to it.

One bitcoin is 100,000,000 satoshis. So owning 0.0008 of one is normal, not a consolation prize. People still think in whole coins, and it trips them up. On 22 May 2010 a programmer paid 10,000 BTC for two pizzas, back when a coin was worth almost nothing. The lesson is not the fortune he spent. It is that the unit worth caring about is the satoshi, the slice, not the whole.

Where to buy: an on-ramp, not just any exchange

You need something that takes ordinary money and hands back bitcoin. The machinery doing that is an on-ramp. Some exchanges build their own, some apps bolt one on, and some payment gateways do nothing else.

Pick a regulated one. The difference is not branding. A regulated provider has to confirm who you are before selling you anything, which is KYC, Know Your Customer, and it exists because anti-money-laundering law demands it, not because anyone wants your selfie. You photograph an ID, take a quick selfie so the face matches, and wait a few minutes. An unregulated app might be cheaper this week and gone the next.

Banxa has run this fiat-to-crypto step since 2014, across more than 100 payment methods in 100-plus countries, which is the dull reason a local option tends to be there for you. Bitcoin is mainstream enough now that El Salvador made it legal tender on 7 September 2021. The plumbing for buying it has grown up alongside that.

Paying for it: card or bank transfer

Two roads, and the gap is mostly speed against cost. A debit or credit card is quickest, often bitcoin in your account within seconds, for a point or two extra. A bank transfer is cheaper and slower: SEPA in Europe, Faster Payments in the UK, minutes to a working day elsewhere.

Some banks block crypto card payments outright. Annoying, but common. A declined card is often your own bank, not the on-ramp, and a quick call or a transfer usually clears it.

Read the fee before you confirm, because flat minimums punish small buys. On a 20 pound purchase a fixed fee can quietly be a tenth of what you spend. Put in 200 pounds and the same fee barely shows. Small first buys are the worst value you will get, which is annoying but worth knowing going in.

One more cost waits further down the road, nothing to do with the on-ramp. Moving bitcoin across the network carries a charge paid to the network itself. More on that once your coins have somewhere to go.

Where it lives, and keeping it yours

Now the decision that actually matters. Once you own bitcoin, someone holds the keys that control it. Either a platform holds them for you, the way a bank holds your cash, or you hold them yourself in a crypto wallet, an app or a small device only you can open. Holding your own keys is self-custody.

Custodial is less to break and quick to start. Forget your password, reset it, carry on. Self-custody gives you full control and the matching risk: no reset, no support line, no undo. Every way to lose it now sits with you.

History settles why this is not academic. In February 2014 Mt. Gox, then handling most of the world's bitcoin trades, collapsed with around 850,000 BTC gone. People holding their own keys that week lost nothing. People who had left coins on the platform are still queuing in a Japanese bankruptcy court more than a decade later.

For pocket money, a custodial account or a phone wallet is fine. Once the amount would genuinely hurt to lose, move it to cold storage, a device that keeps your keys offline and away from any website. Either way your keys get backed up as a seed phrase, a list of 12 or 24 words. Write it on paper. Never type it into a website, and never photograph it. No exceptions.

Receiving bitcoin: the address

If the coins go to your own wallet, you send them to a wallet address, a long line of letters and numbers. Bitcoin addresses mostly start bc1 now. Older ones begin with 3, and the original format with 1.

Check it before you send. Match the first four and last four characters against what your wallet shows, since the middle is where your eye slides past. Send to a wrong or mistyped address and the bitcoin is gone, with nobody to ring and no reversal. Check it. Twice.

Most wallets also show a QR code, which removes the typing and the typos. Scan it where you can. Buying into a custodial account skips all of this at first, because the platform holds the coins. You only meet an address the day you withdraw, which is a good day to slow right down.

Confirmations and the network fee

Bitcoin does not settle the second you hit send. Transactions get gathered into blocks, and a fresh block lands roughly every 10 minutes. Your payment counts as settled once a few blocks pile on top, usually three to six confirmations, which is why a withdrawal can take half an hour to feel final.

That rhythm is baked in. The same 10-minute heartbeat runs the supply schedule, where the reward miners earn halves about every four years, most recently in April 2024, heading for a hard cap of 21 million coins. You do not have to care about any of it to buy. It is just why confirmations are not instant.

Every on-chain move also costs a network fee, paid to the miners, not to Banxa or any platform. It rises and falls with traffic. Quiet week, a dollar or two. Busy market with the queue backed up, it can climb to tens of dollars, which is exactly why pulling a tiny first buy out to your own wallet can cost more than feels reasonable. Plenty of people leave a small buy where it sits until the fee is a rounding error.

So buy a little first. Let it confirm, push a small amount to a wallet you control, pay the network fee once so it stops being theory. The next buy will feel like any other online checkout. When you want out again, the reverse runs just as fast, and here is how to sell crypto and cash out. This one is for learning, not for getting rich by Friday.