I am almost certain, the Exchanges are doing this. A type of engineering to move the crypto market in a certain way.
So, even I think I can do this with enough Bitcoins.
So do you think, they have a team to manage all buy orders and sell orders?
e.g. Sell a certain amount of BTC at the same time selling a certain amount of ETH, Zen, BNB and etc all at the same time?