The best way to keep your cryptocurrency safe is to use a hardware or paper wallet, store it on an exchange with two-factor authentication (2FA), and use a strong password for authentication. Additionally, if you need to store a large amount of cryptocurrency, you should consider using a multi-signature wallet. This is a secure wallet that requires more than one person to sign off on a transaction before it can be executed. Additionally, you should never store your cryptocurrency in a wallet or exchange that is not secured by the latest security protocols or is not hosted on a reputable server. Finally, you should regularly monitor your wallets and accounts for suspicious activity and make sure to restrict access to your private keys as much as possible.