When the upward trend of the fund is good, the fund performance can push the price to continue to rise, or the fund is in a hot spot in the market, investors can buy some at a high level. If the fund is at a high level, most investors in the market will take profits, which may lead to the decline of the fund. At this time, investors mainly wait and see.
When the fund has bottomed out at a low level for many times during the long-term decline, investors can consider buying the fund. If the market is not good, the fund may fall further after a long-term decline, and investors will still wait and see.