The financial world is turbulent, chaotic, and disorderly. Only by discerning things can we be invincible. It won't work if we treat every move of the financial market as a part of a certain mathematical formula. Mathematics can't control the financial market, but psychological factors are the key to control the market. More precisely, only by grasping the instinct of the masses can we control the market, that is, we must know when and how the masses will gather around a certain stock, currency or commodity, and investors can succeed. When choosing a stock in an industry, you should choose two, but not just two, you should choose the best and the worst! There is no shame in making mistakes. What is shameful is that the mistakes are obvious but not corrected! If you are not ready to bear the pain, then leave. Don't expect to be a victorious general. If you want to succeed, you must be ruthless! -George Soros