Becoming a highly defensive-minded trader is a key metamorphosis that beginners must go through on their trading path. Many beginners are often swayed by short-term gains and quick profits, eager to see their accounts grow quickly, and even harbor unrealistic fantasies of getting rich overnight. However, a truly sustainable trading mindset should be based on a more fundamental principle: how to maximize the protection of one's trading capital. These two trading mindsets are actually contradictory to each other. Excessive pursuit of a quick profit mentality often leads to risky decisions that can end up losing your principal faster than you expected. In the world of trading, it is far more important to keep your money in order to have a chance to continue playing, which is far more important than chasing short-term windfall profits.