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A crypto wallet is a software program that allows users to store, send, and receive digital assets. It typically includes a unique public address, which is used to receive coins, and a private key, which is used to access and manage the coins stored in the wallet. The private key must be kept secret, as it is used to sign transactions and provide access to the wallet.

There are several types of crypto wallets. Hot wallets (like mobile and web ones) are connected to the internet, and therefore are more vulnerable to hacking and theft. On the contrary, cold wallets (like hardware and paper ones) are not connected to the internet, which make them less vulnerable and safer.