You can buy it, but it is not recommended. The sharp rise in the valuation of the fund indicates that the price of the fund is also rising. After the fund price rises, the buying cost is higher and the risk is greater, so it is not a good buying opportunity after the fund valuation rises.

If the market rises sharply, investors can buy appropriately, and generally get higher returns when the market is good, but investors should set up profit points and sell them at profit points.