While cryptocurrencies don't have a native "lock" feature, you can enhance security by using reputable wallets, implementing two-factor authentication, safeguarding private keys, and regularly backing up your wallet. Consider using a VPN service to protect your data online. By using a VPN app, all your data goes through a separate encrypted tunnel, thereby becoming indecipherable by hackers. In such a way, you hide your identity and relatable information that fraudsters may exploit to steal your crypto.