A long-term investor must adhere to their investment principles
1. Staying alive is more important than anything; always protect your principal.
2. Only God knows what will happen tomorrow; only earn the dividends given by the trends of bull and bear cycles.
3. Don't take risks to catch the fish head and fish tail; those who can buy are apprentices, but those who can sell are masters. Learn to lower your desires, take profits when they are good, and be content for lasting happiness.