Crypto Wallet
A tool that stores and manages the private keys needed to access and use cryptocurrency on a blockchain.
A crypto wallet is software or hardware that lets you receive, send, and manage cryptocurrency by controlling the private keys linked to your blockchain addresses. The coins themselves are not stored inside the wallet; they remain recorded on the blockchain. The wallet proves you are allowed to move them by creating digital signatures for transactions. Wallets can be custodial, where a service holds the keys for you, or non-custodial, where you control the keys yourself.
Crypto wallets matter because whoever controls the private keys controls the funds. A mobile wallet might be convenient for everyday use, like a physical wallet holding small amounts of cash, while a hardware wallet is more like a home safe because it keeps keys offline and reduces exposure to malware or phishing. When setting up a non-custodial wallet, users are usually given a recovery phrase, which must be stored securely because it can restore access if the device is lost.
Other terms in Wallets & Security
Address Poisoning
A wallet scam where attackers plant lookalike addresses in your transaction history so you might copy the wrong recipient later.
Approval Phishing
A scam that tricks users into granting a malicious wallet or smart contract permission to spend tokens from their wallet.
BIP-39
A standard for turning wallet backup data into a human-readable seed phrase, usually 12 or 24 words.
Custodial Wallet
A wallet where a third party, such as an exchange, holds the private keys and controls access to the crypto on your behalf.