The Americans still know how to play the game, having played around with gold monetary policy for almost a century. Now, other countries have all learned to use gold to challenge their authority. They take the opposite position and start to suppress it, while continuing to coordinate with their two little brother countries. One side prints money to stabilize the economy and save the day, preventing the market from bouncing too quickly. The funds that flow out go to the little brother's house. Once their own stability is nearly achieved, they pull the water back from the little brother's house, pumping and taking the opposite position, and voilà, the economy has invisibly risen again, and the total value of the currency has doubled. The dollar index remains the same; with more quantity, all the printed money is considered free, and it’s still the Americans who know how to play finance, having come up with new tricks after playing for over a hundred years.