Cryptocurrency can be stored in online exchanges, such as Coinbase and PayPal, or cryptocurrency owners can store their crypto cash on hardware wallets. Trezor and Ledger are examples of companies that sell these small devices to securely store crypto tokens. These wallets can be “hot,” meaning users are connected to the Internet and have easier access to their crypto tokens, or “cold,” meaning that the crypto tokens are encrypted in wallets with private keys whose passwords are not stored on Internet-connected computers.