Cryptocurrency is stored in a digital wallet, which can be either software, hardware, or even paper. Choosing the type of wallet to use is entirely up to the user, and depends on how much security and convenience they want. Software wallets are the most common type, and allow users to store their cryptocurrency on a computer, smartphone, or tablet. Hardware wallets are physical devices designed to securely store cryptocurrency, and paper wallets are printed out versions of private and public keys that allow users to safely store digital currency offline.