Foreign exchange is needed for international cooperation. Unless the world is unified as Qin Shihuang unified the six countries and only one currency is used, there is no need for foreign exchange. But this possibility is still very small at present. There are also many different categories of foreign exchange industry, such as currency exchange, foreign exchange settlement faced by international trading companies, preservation and appreciation of foreign exchange investment, and the importance of foreign exchange reserves to enhance national competitiveness. The yen depreciated some time ago. Is it because many people want to travel and shop in Japan? The depreciation of the yen means that the same amount of foreign currency can be exchanged for more yen to be used in Japan. If you know this situation, don't exchange a lot of yen before depreciation, and then exchange it after depreciation, which also avoids losses. Foreign exchange is good for life and investment. At present, ordinary people don't know much about foreign exchange, because most China people stay at home and have a desire to know about the outside world, but not everyone has the conditions to know. After the real opening up, foreign exchange will be quite popular, and people also need to use foreign exchange knowledge to develop. The prospect of this industry is still great.