This kind of investment will be risky, but the fixed investment of the fund is already the best way to avoid risks. Because monthly subscription is based on the market value of monthly subscription share at that time, it reduces a lot of risks compared with one-time subscription. But for a period of time, if the fund has been falling, it must be a temporary loss in the book figures, but the fund is a long-term investment method and cannot be treated so simply. Once the market picks up, the benefits are obvious.