Many people are thinking to take advantage of Bitcoin's price now by selling and buying when it dip again before the bull run start since many are saying bear market is yet over and Bitcoin will drop again. try to study well on your own before you take any action.
After all this, why don't you keep doing this, selling at the top and buying again after a correction, to make more and more money?
The reason is none is certain of when the high price or low price will happen, so many weak hands are quick to act at every possible market behaviour.
Just as you have said, why sell an asset where you can simply hold and earn more profits in the long run?
The answer to that is, many investors are just after their stomachs and not many can withstand the temptation of making a few extra bucks on the investment since they invested all their cash liquidity on bitcoin, so bitcoin becomes their only way to quench their hunger.