What is a crypto wallet?

A crypto wallet is what you use to hold and move your coins. It doesn't literally store the coins (those live on the blockchain) — it stores the keys that prove the coins are yours and let you spend them.

Public key vs private key

Your public key (or address) is like an email address — you share it so people can send you crypto. Your private key (often a 12–24 word "seed phrase") is like the password to your entire wallet. Anyone who has it controls your funds.

Hot vs cold wallets

A hot wallet is connected to the internet (a phone app or browser extension) — convenient but more exposed. A cold wallet is a device kept offline (a hardware wallet) — less convenient, much harder to hack. Big holdings usually belong in cold storage.

The one rule that matters most

Never share your seed phrase — with anyone, ever. No legitimate company, support agent, or giveaway will ask for it. Losing it means losing your crypto; sharing it means someone can take everything. Self-custody comes with real responsibility.