Many people have fought hard in the bull market for a year, with their accounts soaring all the way, and even started dreaming of financial freedom. But when the bear market hits, profits are wiped out in three months, principal shrinks, and some even go into debt. This is not bad luck, but rather the same trap most people fall into — losing control of their emotions.

I'm not an expert either; the reason I can stay in the market long-term is fundamentally because I stick to three "counter-human" things.
First, restrain greed. The better the market, the calmer you need to be. While others focus on doubling their money, I only focus on "locking in gains." The money you earn is only truly yours if you hold onto it. Those who want to eat a big meal in one bite often end up with nothing but bones.
Second, control your actions. There are many opportunities in the market, but not every time you should act. Many people don’t make wrong judgments; they just trade too often, driven by emotions. Stable people mostly spend their time "doing nothing."
Third, endure the cycle. The real difficulty isn’t losing money, but the long periods of market indifference and stagnation. No one sets the pace, no stimulation of returns, and you even start to doubt yourself. But it’s precisely during this time that you decide whether you have bullets left for the next round and whether you have the right mindset.