This is SHOCKING.

Jane Street’s secret trading technique is to accumulate shares, then dump them in seconds to crash the price and profit from shorts.
They ran the same 10 AM manipulation algo in Indian markets and made $4.23 billion, which led to a temporary ban by the Securities and Exchange Board of India.
Their playbook is simple:
1) Have billions of dollars from investors
2) Buy spot Bitcoin at, say, $68k
3) Open massive shorts via options or derivatives
4) Sell large amounts of BTC in minutes with algos, combined with low liquidity or negative news to trigger panic selling
5) Price crashes to $62k
6) Close shorts for massive profits while losing just 5% on spot
7) Buy spot Bitcoin again at $62k, squeeze shorts, and create FOMO to push price higher
8) Open massive shorts again...
Rinse and repeat.
In India, Jane Street still has $560 million frozen in an escrow account with SEBI, and the manipulation case is ongoing.