Topic
What is a crypto custodian?
Last reviewed:
- Quick fact 1
A custodian holds the private keys and controls the crypto on your behalf.
Source: SEC Investor Bulletin: Crypto asset custody basics for retail investors (Dec 12, 2025)
- Quick fact 2
If a custodian is hacked, shuts down or goes bankrupt, customers can lose access to their crypto.
Source: SEC Investor Bulletin: Crypto asset custody basics for retail investors (Dec 12, 2025)
- Quick fact 3
FDIC insurance does not protect against a crypto custodian’s failure.
Source: FDIC: What the public needs to know about FDIC deposit insurance and crypto companies
The short lesson
A custodian is a company that holds something valuable for you. In crypto, a custodian holds the private keys. Most exchanges are custodians: when you buy crypto there and leave it, the exchange controls the keys and shows your balance in its own books.
That can be convenient. You get a password reset, customer support and an easy way to buy and sell. But you are trusting the company with real control.
What to understand before you trust a custodian:
- Who actually holds the crypto? The company, a partner, or a mix?
- Is your crypto kept separate from the company’s own assets, or pooled?
- Can it lend or use your crypto? Read the terms.
- What happens if it fails? In a bankruptcy, customers may wait a long time or get back less.
FDIC insurance does not cover crypto custodians. See Is crypto FDIC insured?
Related terms
Go deeper in Lesson 7: What an exchange is
Common questions
Is an exchange a custodian?
Usually yes, when it holds your crypto in your account.
What happens if a custodian goes bankrupt?
Customers may become creditors and wait for a court process. They can get back less than they had.
Can a custodian freeze my account?
Yes. Companies can freeze accounts under their terms or when the law requires.
How is this different from self-custody?
In self-custody, you hold the keys and no company can move or freeze the crypto.