Back to: Wallets & Security 101
“Not your keys, not your coins” is the most repeated sentence in crypto — and the least understood until it’s too late. This lesson makes it concrete: what custody actually means, what you’ve trusted so far, and why holding your own keys changes everything.
The two ways to hold crypto
Custodial — someone else holds your keys. An exchange account, a fintech app, an ETF. Convenient, recoverable, familiar. But: they can freeze withdrawals, get hacked, go bankrupt, or be ordered to seize funds. History has examples of all four — Mt. Gox, FTX, and others.
Self-custody — you hold the keys in your own wallet. Nobody can freeze, lend out, or lose your coins except you. But: lose the keys and the coins are gone forever. No support desk, no chargeback, no reset button.
The trade, stated honestly
| Custodial | Self-custody | |
|---|---|---|
| Convenience | High | You do the work |
| Recovery if you mess up | Usually yes | Never |
| Seizure/freeze risk | Real | ~Zero |
| Hack target | Giant honeypot | Only you |
Why this course exists
Most losses aren’t hacks — they’re custody mistakes: keys on an exchange that collapsed, a seed phrase screenshotted to the cloud, a “support agent” who needed “verification.” Every lesson from here builds one skill: being your own bank *without* becoming your own worst enemy.
Self-custody isn’t paranoia. It’s the entire point of cryptocurrency: money
> no one can take from you — including the people you trusted to hold it.
Next lesson: hot vs cold wallets — choosing your setup.