What is a crypto wallet?
The short answer
A wallet doesn't hold your coins. It holds the keys that prove they're yours, and lets you sign transactions.
The misunderstanding
Your crypto never actually leaves the blockchain. A walletWallet Software or a device that stores the keys you need to access and move your crypto. stores the private keysPrivate key A secret number that proves ownership of crypto. Anyone who has it can move the funds. that control your coins, and uses them to sign transactions when you want to move them.
Types of wallets
| Type | Example | Good for | Watch out for |
|---|---|---|---|
| Exchange account | Your balance on a trading app | Beginners, frequent trading | The exchange holds the keys (custodianCustodian A company that holds crypto on behalf of its customers, such as an exchange.) |
| Software wallet | A phone or browser extension app | Using apps, smaller amounts | Malware, fake apps, phishingPhishing Tricking someone into giving up passwords, keys or approvals by pretending to be a trusted party. |
| Hardware walletHardware wallet A small physical device that keeps your private keys offline and signs transactions without exposing them. | A USB or Bluetooth device | Long-term savings | Losing the device and the backup |
“Not your keys, not your coins”
If an exchange holds your crypto, you’re trusting that company, much like a bank but usually without deposit insurance. Self-custodySelf-custody Holding your own private keys instead of trusting an exchange or other company to hold them for you. removes that trust, but puts all the responsibility on you.
Neither choice is right for everyone. Many people use both: an exchange for buying, and a hardware wallet for savings.
Your address
To receive crypto, you share a public addressPublic address The string of characters you share so others can send you crypto, like an account number.. It’s safe to share, like an account number. Your private key and seed phraseSeed phrase A list of 12 or 24 words that can recreate all the private keys in a wallet. Never share it. are never safe to share.
Last reviewed Oct 3, 2026. Educational content only, not financial advice.