When the market is not good, you should stay out of the market. For example, if your strategy has clearly been losing money recently, and you had a significant loss, it's time to take a break. A true expert takes a break even after making a large profit because the market conditions may soon diverge from their strategy. What follows could be the consumption of the wealth you previously earned. James Wynn made a lot of money but didn't stop; even after a big loss, he didn't stop. The fact that he made so much money indicates that his strategy and technical skills are definitely not the problem; it's just that the market is no longer in his favor. He didn't stay out of the market to hedge against it, and the market ended up consuming him.