Wallet
In simple terms
A digital wallet is like a secure container for your cryptocurrency—similar to a physical wallet holding cash or cards. It stores the special codes (called keys) that prove you own your crypto and allow you to send it to others.
Definition
A tool used to store cryptocurrency keys.
In depth
A cryptocurrency wallet is software or hardware that manages a pair of cryptographic keys: a public key (your address for receiving funds) and a private key (a secret that authorizes transactions). When you initiate a transaction, your wallet uses the private key to create a digital signature that proves ownership without revealing the key itself. The wallet also tracks your balance by querying the blockchain ledger and can broadcast signed transactions to the network for miners or validators to process.
How does Wallet work?
A wallet stores keys, not coins; the balances themselves live on the blockchain. When first set up, it generates a random secret, expresses it as a recovery phrase, and derives a tree of private keys from it. Each private key produces a public key, and each public key produces an address others can send to. To move funds, the wallet builds a transaction, signs it with the matching private key to prove ownership, and broadcasts it to the network's nodes. It shows a balance by scanning the chain for unspent outputs or account entries tied to its addresses.
An example
Illustrative example: someone sets up a wallet, writes the recovery phrase on paper, and receives $200 of a coin at the first address it generates. The phone is later destroyed. Because the coins were never inside the phone, installing the same wallet software elsewhere and entering that phrase rebuilds the same keys and the same $200 balance. Had the phrase been lost too, nothing on the chain could be recovered.
Figures are illustrative only.
What beginners get wrong
- Believing the coins sit inside the app; the wallet holds keys, and losing them without a backup leaves the funds permanently unreachable.
- An exchange account is not a wallet — there the company holds the keys and you hold a claim against the company.
- Sending a token over the wrong network to an address that looks valid commonly puts the funds beyond recovery.
- Moving a large balance into a brand-new wallet without a small test transfer first skips the only cheap check of address and network.
Related terms
Part of
How do crypto wallets and self-custody work? — the subject page for wallets and self-custody, with all 13 of its definitions in one place.
Educational only — not financial advice.