$BTC SAFU (Safety First) is the survival rule for traders:

Fund Isolation: Use only idle funds, refuse to borrow leverage;

Position Control: Single risk <2%, total position matches volatility;

Disaster Recovery Plan: Reserve 'escape funds' to cope with extreme market conditions;

Technical Moat: Use cold wallets/multi-signature to ensure asset safety.

The essence is to respect the market: even the most sophisticated strategies require redundant design, survival > excessive profit.