Manipulating the market requires super-large costs, and cannot be done alone. If there really is such an organization it should have been tracked for a long time, and I hope this is just a matter of concern.
You can make a lot of USDt at low cost and buy as much bitcoin as you want with it. Then you can use it to crash leveraged positions at the same time leveraging with your real money.
Bitcoin markets are very easy to manipulate because centralized stablecoins with unknown % of backing exist and exchanges can play and even make money on leveraged trades with their client's coins. Many businesses lost by doing that and had to fake hacks and run with what they had left.