The recent fall in the past two days makes me feel pointless blaming myself. It's more practical to reflect on why I didn't sell when the price was relatively high before. There are two situations to reflect on for myself:

1) Being too greedy at relatively high points, didn't sell, and didn't take any profits;

2) At relatively low points, not buying at all. During the middle phase, it is indeed difficult to predict. The rapid rise and fall of the market is often abrupt and unpredictable.