Precious metals investment is divided into physical investment and leveraged electronic trading investment, as well as bank paper, gold, paper and silver. Among them, physical investment refers to the process that investors earn the difference by buying low and selling high when they are optimistic about the precious metal market. It can also be a means to avoid risks when the economic outlook is not optimistic, and realize the preservation and appreciation of assets. Electronic trading refers to the decision to buy or sell precious metals such as gold and silver according to market price fluctuations. This kind of transaction generally has leverage, which can make a big return at a small cost.