Protecting cryptocurrency assets requires multiple layers of defense. First, store the majority of your assets in a hardware wallet (cold storage), keeping private keys offline to avoid network attacks. Use hot wallets only for small amounts needed for daily transactions. Second, keep your private keys and seed phrases strictly confidential; never screenshot or store them in the cloud. It is recommended to handwrite backups on fireproof and waterproof physical media, and store them in different locations. Enable two-factor authentication (2FA) and avoid using SMS verification; prefer Google Authenticator or hardware security keys. Be cautious of phishing links; always verify the authenticity of the website before trading and avoid clicking on unknown emails or social media messages. Regularly update your wallet software and operating system to patch security vulnerabilities. Diversify investments across different wallets and exchanges to reduce single points of failure. Finally, maintain a rational approach to high-yield projects and be wary of smart contract vulnerabilities and scam traps.