Recall that in 2000, Nasdaq technology stocks in the United States generally shrank significantly.

Much of Gates' wealth is reflected in the Microsoft stocks he holds. The decline in stock prices has naturally led to the shrinkage of his wealth.

Secondly, charitable donations. From 1997 to 2006, he donated a total of 15 billion in assets.

In addition, his company lost a monopoly lawsuit, and the combined fines and business losses amounted to US$7 billion.