Investing is so difficult because it requires you to master four things at the same time.

- Knowledge
You need broad coverage—history, culture, and industry trends all have to be understood.
You need deep depth—economic theory, company fundamentals, financial analysis, market structure, and your own industry knowledge; none can be missing.
- Analytical ability
In a sea of information, you can distinguish what matters, assign probabilities to different outcomes, read financial statements, identify key indicators, and understand exactly what a company’s business and products are really making money from.
- Psychological resilience
Know what emotional biases you have, confirm bias, recency bias, and survivorship bias—then, when greed and fear both surge at the same time, you can still make decisions with rationality, withstand drawdowns, and tolerate volatility.
- Willingness to take risks
You may have the first three, but without this one, you won’t make a single cent.
Because no matter how deeply you analyze, the future results are fundamentally unpredictable—chaotic, and beyond your control.
You must place a bet in uncertainty, and no one can do that for you.