Custodial vs Self-Custody
Who holds your keys, and the trade-offs of each.
You’ll cover
Lesson map
Two models
With a custodial wallet - typically an exchange account - a company holds the keys for you. It feels like online banking: reset your password, call support. But you're trusting them not to freeze, lose, or misuse your funds.
With self-custody, you hold the keys yourself. Nobody can freeze your account, but nobody can bail you out either. Lose the seed phrase and the funds are gone.
Hot vs cold
A 'hot' wallet is connected to the internet - convenient for daily use but exposed to online attacks. A 'cold' wallet keeps keys offline, on a hardware device or paper, out of reach of remote hackers.
A common pattern: keep a small spending balance in a hot wallet and the bulk in cold storage.
Remember
Rule of thumb: only keep in a hot wallet what you'd be comfortable carrying as cash.
Self-check
Check your understanding
Try each question before opening the answer.
In a custodial wallet, who holds the private keys?
- A.You alone
- B.The company/exchange
- C.The blockchain nodes
- D.No one
Reveal answer
B. The company/exchange
Custodial means a third party holds the keys for you - convenient, but you're trusting them.
What is cold storage?
- A.A wallet frozen by an exchange
- B.Keys kept offline, away from internet attackers
- C.A stablecoin
- D.A refrigerated data center
Reveal answer
B. Keys kept offline, away from internet attackers
Cold storage keeps private keys fully offline, greatly reducing the risk of remote theft.
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