You can choose a fixed investment or a one-time purchase. In a bull market, investors can buy at one time. In a bear market, investors can choose a fixed investment. The biggest advantage of a fixed investment is that it disperses the investment risk. The more the fund falls, the more cost-effective it is, and the average income is obtained from the fixed investment.

One-time buying is suitable for investors who have frequent trading and certain trading experience, while fixed fund investment is more suitable for investors who have no time to watch the market and have no trading experience.