What's the impact of fleeing to other countries with huge sums of money?

Paper money itself is worthless, but it can be exchanged for real things. The outflow of paper money is equivalent to the outflow of physical objects. For a simple example, suppose you have 654.38+00 billion yuan to spend in the United States, and then Americans can buy goods from China with 654.38+00 billion yuan, then this 654.38+00 billion yuan will become American, but for the country, 654.38+00 billion yuan is as useless as waste paper, but it has lost 654.38+00. Therefore, immigration and foreign currency exchange must be strictly controlled.