Web3 without jargon: knowledge that gives you control.

This sentence circulates through web3 like a proverb: "not your keys, not your coins." It sounds like a slogan, yet it is one of the most important practical lessons in the entire space.

Two ways of holding funds

When you buy cryptocurrency on an exchange, it is usually the exchange that holds the keys. You see a balance on your screen, but technically it is a company's promise to pay out your funds on request. It is convenient, and it feels a lot like a bank account.

The alternative is self-custody, a wallet where only you hold the keys. No one can freeze your funds or disappear with them, but no one can recover them for you either.

How the two differ

• Control. On an exchange, you trust a company. In self-custody, you trust yourself and your habits.
• Risk. An exchange can collapse or restrict withdrawals. In self-custody, the risk is your own mistake, a lost phrase, or phishing.
• Responsibility. Freedom has a price: full control comes balanced by full responsibility.

A practical compromise

For many people, a mixed approach works best: small amounts and day-to-day transactions on a reputable exchange, savings in your own wallet, ideally a hardware one. The point is not to pick the "one true" path, but to decide consciously whom you are entrusting your keys to at any given moment.

The question is not "exchange or wallet". It is: "do I know who is holding my keys right now, and am I comfortable with that?"

If, after reading this article, you can answer that question for your own funds, you are already ahead of most people entering web3. This is exactly the kind of education we care about: not investment advice, but the understanding that lets you decide for yourself.