Jane Street earned $10 billion in trading revenue in a single quarter.

As a scale reference, that's more than what Goldman, JP Morgan, Citi, or Bank of America achieved in the same period.
Last year, they were banned from operating in the Indian stock market for manipulating a national index. $570 million was seized from them, and they were labeled as "not a good-faith actor deserving of trust."
Today, they are being sued for insider trading that helped trigger the $40 billion collapse of Terra.
And since they are classified as a trading firm and not a hedge fund, they are exempt from disclosure rules that would require them to show how they actually make their money.
This is also the firm managing BlackRock's Bitcoin ETF, by the way.