Story of time 

When you come to the society, you will find that the more the rich can help each other and support each other, and the lower the people, the more severe they struggle with each other. Perhaps this is the bad nature of the poor. The social resources at the bottom are not sufficient, and the opportunity to make money is more difficult than that of the rich. The ability to pit risks is lower, and they are less willing to touch high-risk and high-yield investment. However, if the people at the bottom have the opportunity to climb out and have the power, they will exploit the people at the bottom.