Emotional trading—many people, after making some money early on, start to think they're trading geniuses, leading to overconfidence, frequent position increases, and excessive leverage. When mistakes happen, they get wiped out. Some others, due to initial lack of understanding, experience frequent losses, become angry, and enter gambler mode, making reckless moves until all funds are gone. Only then do they realize the mistake. But it's already too late. Trading isn't about throwing a tantrum; calmness and discipline are more important than luck.