Cryptocurrency holdings are prime targets with over $1.7 billion stolen in 2025. Hardware wallets (Ledger, Trezor) store private keys offline immune to remote attacks. Never connect hardware wallet to untrusted computers. Hot wallet security: Enable all available security settings. Browser extension security is critical. Phishing defense: Verify URLs carefully. Never enter seed phrase on any website. Exchange security: Use dedicated email, enable every 2FA method, withdraw funds to personal wallets. DeFi risk: Only use audited protocols. Our guide includes specific checklists for each wallet type and recovery plan if crypto is compromised.