Generally, it's difficult for us to buy at the lowest point, so we inevitably face the issues of the left side and the right side.
On the left side, we face a psychological dilemma of continuing to fall: should we continue to buy?
On the right side, we face the dilemma of missing the lowest point: should we rush to catch up?
Both dilemmas are quite uncomfortable, and the worst part is that most people cannot judge the critical area. They tend to want to chase after prices have risen significantly and buy just when they have fallen, but when prices have dropped too much, they are hesitant to continue buying or simply don't have the money to buy anymore.