What is Wallet?

A cryptocurrency wallet is a device or service that stores users' public and private keys, allowing them to interact with various blockchains and to send and receive crypto assets. Wallets can be digital (software) or physical (hardware), hot (connected to the internet) or cold (disconnected from the internet), custodial (a trusted third party has control of a user's private keys) or non-custodial (only the user controls their private keys).