What is self-custody?

Who actually holds the keys to your crypto? Think of the difference between something you keep at home and something you leave in a third party’s storage facility: in the second case, you need their cooperation to get it back.

In crypto, coins aren’t literally inside the wallet app. The relevant records live on the blockchain. The wallet manages the private keys, with which you sign transactions and prove that you can move the corresponding assets.

A self-custody wallet is often described as non-custodial, meaning its provider doesn’t hold your funds. It can be a mobile app or a hardware wallet. What matters isn’t the device but who controls the keys.

Why it matters

When you keep crypto on a centralized exchange, it usually manages the keys and processes your withdrawals. If it suspends withdrawals or runs into trouble, you may not be able to access your money. With self-custody, you don’t depend on the exchange’s approval to sign a transaction from your wallet.

Our team sees this independence as a real advantage, but not as free security. The responsibility shifts to you: from safeguarding your recovery backups to checking the address and network before you send. Self-custody doesn’t eliminate network fees or the risks of the apps you interact with.

What to watch out for

Many wallets use a seed phrase (recovery phrase) from which the keys are derived. Anyone who obtains that phrase can usually restore the wallet and move the crypto. Never give it to anyone, not even someone posing as tech support.

If your phone is lost or your device breaks, a proper recovery backup can restore access. If both the keys and every available recovery method are lost, there’s usually no company that can give it back to you. Also, self-custody doesn’t protect you from a malicious transaction that you approve yourself.