Just read this news https://cointelegraph.com/news/bitcoin-made-up-97-of-total-crypto-inflows-in-2021

Most of investors right now tend to collect bitcoin as much as as they can when bitcoin price drop comparing to sell their bitcoin when its price try to decrease.

Also, your statement maybe wrong because bitcoin price is not drop drastically as you think. You can compare with the increased price movement a few days ago, its price just decrase $14.000 from its all time high, which mean there are still many opportunities to increase more.