A thought: after you buy or sell, you actually don’t need to keep obsessing over the price. Whether you “sold too early” or bought at a high, it feels miserable at the moment—but as long as the price keeps moving over the next one or two days, that kind of perception fades quickly. What truly keeps draining people is often regret, fear, and the brief sense of pride from a short-term rise.

When you sell and the price goes up, you feel like you sold the wrong way; when you buy and it goes down, you start to doubt yourself; the next day, it suddenly rebounds, and you think everything is fine. Your emotions keep tracking the price, and it’s easy to get your attention trapped in the price fluctuations over just one or two days. We should instead spend more effort understanding and reviewing what happened—what the underlying causes of this rise and this fall really are.