What Is Crypto Custody?
Crypto custody refers to who holds and protects the private keys that control a set of digital assets. If an exchange holds them, the service is custodial; if you hold them yourself, it is self-custody.
On this page 6
Crypto custody refers to who holds and protects the private keys that control a set of digital assets. If an exchange or company holds the keys, you are using a custodial service. If you hold them yourself, that is self-custody. The choice decides who can move your coins and who is on the hook when something goes wrong.
How does custodial storage work?
When you buy crypto on an exchange, the coins typically sit in wallets the exchange controls, usually pooled with other customers’ funds. The balance in your account is effectively a record of what the exchange owes you. When you withdraw, the exchange sends coins from its own wallet to your address.
The upside is convenience. Forget your password and you can recover the account through identity checks, and you don’t need any technical knowledge to trade. The downside is that you must trust the platform. When FTX halted withdrawals and filed for bankruptcy in November 2022, customers were locked out of their funds for a long time.
What is self-custody?
With self-custody, the keys live in your own wallet, whether that is an app on your phone or a hardware wallet. You don’t need anyone’s permission to transact, and no platform can freeze your account. The crypto mantra “not your keys, not your coins” is an argument for this model.
In exchange, all the responsibility shifts to you. Lose your seed phrase and there is no help desk to reset it; let it be stolen and the thief can drain your wallet.
Custodial vs. self-custody: the key differences
- Who holds the keys: The platform, or you.
- Losing access: Custodial accounts can usually be recovered; with self-custody and no backup, access is gone for good.
- Counterparty risk: A custodian’s bankruptcy, hack or withdrawal freeze affects you; with self-custody that risk disappears.
- Ease of use: Custodial services are simpler for trading; self-custody takes more care.
Many people use both: a small trading balance on an exchange and long-term holdings in their own wallet. Our hot vs. cold wallets guide goes deeper on that split.
What is institutional custody?
Funds, companies and banks keep large holdings with specialist custodians. These firms typically combine cold storage, multisig or similar key-splitting techniques, insurance and regular audits. The assets behind US spot Bitcoin ETFs are held by custodians of this kind. Regulators in many jurisdictions now set specific rules for firms that hold crypto on behalf of clients.
Frequently asked questions
Which is safer, an exchange or my own wallet?
There is no single answer. Self-custody removes counterparty risk but leaves you exposed to your own backup mistakes. If you can store a backup securely, self-custody gives you more control over long-term holdings.
How do I move crypto from an exchange to my own wallet?
Copy the address from your wallet’s “Receive” screen, choose the correct network on the exchange and submit a withdrawal. Our Bitcoin transfer guide walks through the steps.