The #1 Rule of Crypto Security
Never share your seed phrase (recovery phrase) with anyone, ever. Not with “customer support,” not with a “wallet recovery service,” not with anyone who DMs you. Anyone with your seed phrase has full access to your crypto.
Essential Security Steps
1. Use a Hardware Wallet for Large Holdings ($1,000+)
- Ledger Nano X ($149): Most popular. Bluetooth, supports 5,500+ coins. Buy ONLY from ledger.com (never Amazon/eBay - could be tampered with).
- Trezor Model T ($219): Open-source firmware. Touchscreen. No Bluetooth (some consider this more secure).
- Hardware wallets keep your private keys offline. Even if your computer is hacked, your crypto is safe.
2. Enable 2FA on Everything
- Use an authenticator app (Google Authenticator, Authy) - NOT SMS (SIM swap attacks are common)
- Enable 2FA on your exchange account, email, and any crypto-related accounts
- Save backup codes in a secure location (not on your phone)
3. Secure Your Seed Phrase
- Write it on paper (or stamp it on metal for fire/water resistance)
- Store in a safe, safety deposit box, or split between two secure locations
- NEVER: Store digitally (no photos, no cloud storage, no notes app, no email)
- NEVER: Enter it on any website (legitimate wallets never ask for your full seed phrase online)
Most Common Ways People Lose Crypto
- Phishing (40% of losses): Fake websites that look like real exchanges. Always type URLs directly or use bookmarks.
- Seed phrase theft (25%): Sharing seed phrase with fake “support” or entering it on a scam site.
- Lost access (20%): Forgetting passwords, losing seed phrases, dead hardware without backup.
- Exchange hacks (10%): Exchanges getting hacked. Mitigate by not keeping large amounts on exchanges.
- Malware (5%): Clipboard hijackers that change wallet addresses when you copy/paste.
Security Checklist
- 2FA enabled on all accounts (authenticator app, not SMS)
- Unique, strong password for each crypto account (use a password manager)
- Seed phrase written on paper and stored securely offline
- Hardware wallet for holdings over $1,000
- Exchange bookmarked (never click email links to log in)
- Withdrawal address whitelist enabled on exchange
- Email account secured with 2FA (your email is the master key)
Source: Chainalysis Crypto Crime Report 2025, Ledger security documentation, Coinbase security best practices