The economy is declining, so quantitative easing is implemented, but it is not a long-term solution. When the American and British economies are improving, other countries will experience capital outflows. One is the exchange rate relationship, and the other is investing in the United States and Britain. Loose money will be converted into dollars and pounds, which will flow abroad, leading to tight foreign exchange, falling exchange rate and entering a vicious circle.

Another possibility is to clean up China. China has not only US dollar foreign exchange reserves, but also non-US currency reserves. The depreciation of the euro and the yen will cause the foreign exchange to shrink, the central bank will run a huge deficit, and China's wealth will evaporate out of thin air.

The depreciation of the exchange rate is also beneficial to exports, but without foreign exchange reserves, there is not enough power to short foreign currencies, which leads to an uncontrollable sharp decline in the exchange rate.