When Bitcoin dropped to 76k, those who sold believed it would fall even further. It's easy to talk in hindsight after something has happened. Maybe Bitcoin would've gone lower, in that case those sellers would've been seen as making the right call. That outcome was a very real possibility. But it didn't happen, Bitcoin climbed back above 100k. In situations like this, I prefer holding steady over making frequent trades.
After all, not selling doesn't lead to much regret, but selling and then watching it go up hurts a lot more. That's why we see a lot of FOMO buy.