With self-custody you hold the keys and the responsibility; with a custodian such as an exchange, someone else does. Compare the risks and choose.
Who holds the keys?
| Self-custody | Custodial | |
|---|---|---|
| Who holds the keys | You | A company |
| What you own | Bitcoin on the blockchain | A claim on the company |
| If they're hacked or go bust | Not affected | You might lose funds |
| If you lose your seed | Funds are lost | Password reset is possible |
| Can it be frozen | Not by a third party | Yes |
| Privacy | Better | The company knows your activity |
"Not your keys, not your coins"
History has many examples of exchanges collapsing or freezing withdrawals. With a custodian, your balance is a promise. With self-custody, it's yours, but nobody can help if you lose access.
A sensible middle ground
- Keep only what you're actively trading on an exchange.
- Move savings to a wallet you control, ideally a hardware wallet.
- Back up the seed properly and test a recovery with a small amount.
- For large amounts, consider Multisig so that no single mistake loses everything.
Withdrawing from an exchange, step by step
- Set up your own wallet and back up its seed phrase.
- Copy a receiving address from your wallet.
- Withdraw a small test amount from the exchange to that address.
- Check it arrived: paste the txid into MyBitcoinExplorer's search.
- Withdraw the rest once the test works.
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Key takeaways
- Custodial means a company holds your keys; self-custody means you do.
- Custody risks: hacks, insolvency and freezes. Self-custody risks: losing your seed.
- Move savings into self-custody with a solid backup.
Common questions
Is it safe to keep bitcoin on an exchange?
It depends on the exchange, and you rely on it completely. Many people keep only short-term trading balances there.
What's the first step to self-custody?
Install a reputable wallet, write the seed down offline, then withdraw a small test amount.
What does 'not your keys, not your coins' mean?
If someone else holds the private keys, you rely on them to give you your bitcoin back.
Is self-custody risky?
It moves the risk from a company to you. Good backups and a hardware wallet make it manageable.