It's difficult for entrepreneurs to be good investors. This is because good long-term investing requires extraordinary patience and patience, while entrepreneurs' default preference is to act—get started first, and then think later. It's almost impossible for soldiers to be good investors. Success on the battlefield requires high trust among team members and the ability to make quick decisions even with incomplete information. These personality traits and behavioral patterns, when applied to investing, can lead to rapid bankruptcy. On the battlefield, teams face a common enemy and the immense pressure of imminent death. Therefore, teams with high mutual trust and swift action are more likely to survive and succeed. Over time, this high level of trust and the sense of honor inherent in close cooperation become ingrained, making it easy for scammers to exploit the high level of trust among military personnel and defraud them of large sums of money. A typical victim is former US President Ulysess Grant (1822-1885). In the business world, the concept of friend or foe is very vague, and even partners often have significant conflicts of interest. Therefore, maintaining a high level of suspicion and defaulting to distrust is the key to survival. History is filled with examples of successful generals on the battlefield who, after retirement, lost their fortunes through investment. However, the opposite is true, as highly successful investors are generally older and don't need to personally fight on the battlefield. Machiavelli certainly couldn't compete with Sun Tzu on the battlefield. But if Sun Tzu were to take off his armor and return to court politics, he would likely be tormented by Machiavelli, leaving him bewildered.