Would you be unable to sleep because Elon Musk has hundreds of billions? Not at all. Because he's too far away from you, like an alien. What really breaks your defenses is that brother who used to sleep on the top bunk with you, failed more exams than you, and came back during the New Year with a Porsche. Humans, as animals, are not actually afraid of being "poor," but afraid of being "poorer than the people around them." Your sense of happiness has never depended on how much money you have in your hands, but on how much money the people in your social circle have. This is the human flaw: as long as others are not better off than you, you can even eat instant noodles and feel like you're dining at a banquet. It's very simple to ruin your own life—just keep staring at your neighbor's bowl.