Many people think investment failures happen because they lack information, had bad luck, or missed the opportunity—but the real reason is often simpler: you didn’t rein in yourself. Three reasons: First, when everyone believes “steady, guaranteed profit with no loss,” the risk is already at its peak. The longer stability lasts, the more fragile the system becomes. Second, people aren’t unaware of risk; even knowing the danger, they are still dragged along by greed, refuse to cut losses, and add more as they keep getting it wrong. Third, humans are inherently irrational; mental accounting, loss aversion, and the endowment effect lead you to make wrong decisions again and again. So the issue is never: Will the market fall? Where are the opportunities? Instead, it’s: Have you seen clearly your own greed, fear, and wishful thinking? Have you built a “system that can constrain yourself”? Most people stop at the first layer: blaming failure on the environment and luck. A few reach the second layer: knowing the problem is within themselves, yet repeatedly losing control. An extremely small number reach the third layer: acknowledging human weakness and managing it with rules. True financial freedom isn’t about how much money you make; it’s that one day you can calmly say: I will make mistakes, but these mistakes can no longer destroy me.