I've noticed that every time the stock market goes up, crypto goes down in price. The same thing happens vice versa.
I believe this shouldn't happen in the first place as crypto was meant to distance itself from the centralized world.
Crypto should be independent from whatever happens in the outside world.
These guys moving in and out of crypto are also experienced traders in stocks or even forex. I don't see anything wrong there, they are free to trade in whatever market they want.