What destroys traders is not the market, but three types of mental demons:

Expectation Addiction: Wanting to catch every wave, feeling anxious when missing out. But the market won't give you opportunities just because you try hard.
Emotional Revenge: After losing once, rushing to win it back—90% of the time, that's the beginning of a nightmare.
Illusory Confidence: Just making a little profit, and thinking you see through the market.
The courage in trading is: being able to stay out of the market when needed, admit mistakes when they happen; wait patiently when required, and not be influenced by others.