Top Cold Wallets for Storing Cryptocurrencies The top cold wallets for securely storing cryptocurrencies offline are: OneKey Ledger Trezor SafePal Tangem Ellipal Key Points: Cold wallets, also known as hardware wallets, are offline custody devices for crypto assets. They store private keys offline and connect to other devices via USB or Bluetooth rather than maintaining a constant internet connection like hot wallets. This offline storage method provides the highest level of security for crypto assets.