Topic
What is self-custody in crypto?
Last reviewed:
- Quick fact 1
In self-custody, you hold the private keys yourself instead of a third party.
Source: SEC Investor Bulletin: Crypto asset custody basics for retail investors (Dec 12, 2025)
- Quick fact 2
With self-custody, if you lose your keys, you may lose your crypto.
Source: SEC Investor Bulletin: Crypto asset custody basics for retail investors (Dec 12, 2025)
- Quick fact 3
Storage choices include hot (online) and cold (offline) wallets.
Source: FINRA: Storing crypto assets
The short lesson
Self-custody means you hold your own private keys, usually in a wallet app or a hardware wallet, backed up by a seed phrase. Nobody else can move your crypto, and nobody else can freeze it.
The other choice is a custodian, such as an exchange, that holds keys for you. You log in to an account, and the company moves crypto on your behalf.
What self-custody gives you:
- Control. A company failure or freeze does not lock your crypto.
- Direct access to the blockchain.
What it asks of you:
- You are the backup. Lose the seed phrase and the device, and nobody can help.
- You are the security team. You must spot phishing, fake apps and bad approvals.
- No undo. A send to the wrong address is final.
Neither choice is right for everyone. The point is to know which one you are using. Lesson 8 explains “not your keys, not your coins.”
Related terms
Go deeper in Lesson 8: What not your keys means
Common questions
Is self-custody safer than an exchange?
It removes company risk but adds personal risk. It is safer only if you protect your keys well.
What do I need for self-custody?
A wallet that gives you the seed phrase, and a safe, offline backup of that phrase.
Can I use both?
Yes. Many people keep some funds at an exchange and some in self-custody. Know which is which.
Can anyone recover my self-custody wallet?
Only someone with your seed phrase or keys. That is why you never share them.