Crypto investing is about only eating the fish meat and taking profits quickly; essentially, it's about restraining greed and fear. The fish head offers high profits but carries unknown risks, the tail experiences large fluctuations and is easy to get caught in, while the fish body has a clear trend and the highest win rate, aligning with a conservative mindset.

Psychologically, one must overcome the impulse to chase highs and the anxiety of missing out, not letting short-term rises and falls sway emotions, and maintaining the bottom line of "not greedily taking the last penny." In terms of position management, avoid full positions and heavy holdings, build positions gradually, take profits in stages, and use light positions to stay calm. Profits should be realized promptly, and preserving the principal is more important than chasing huge gains. A steady mindset and controlled positions are key to long-term survival.