Given the track record of holding the powerful accountable is terrible, I don’t think this is directed at hedge funds but is a warning to the little people.
Criminal prosecution is held to a much higher evidentiary standard than civil fines. Almost all market related crimes, including manipulation and insider trading, require mens rea. Proving state of mind beyond a shadow of a doubt is really difficult to do. Especially when the defendant is sophisticated enough to know the law and have access to high-quality legal advice.
Any US Attorney would absolutely love to have the feather in his cap of sending a billionaire hedge fund manager or investment banker to prison. Hell, the reason Rudy Giuliani is a household name is because he managed to do that. But no prosecutor is going to bring a case that he has no chance of winning.
Given that it makes much more sense to target enforcement with civil fines rather than criminal prosecution. You can tie up your resources to fight expensive, hard to prosecute criminal cases. Or you can quickly settle for reasonable fines, and cover many more cases with the same set of limited resources.
But why does this sort of thing seem to be the norm? https://en.m.wikipedia.org/wiki/S.A.C._Capital_Advisors
It's clear that everyone should be lawyering up depending on what positions they had when they started pumping this idea to the masses. That said, I'm a big believer in "a fool and his money". If there are hedge funds or retail investors out there who, perhaps, didn't understand all the risks of what they were doing, protecting them from their folly only causes more problems in the future.
As horrible as this sounds, now is the time to let everyone fail. Hard. If we don't, no lessons will be learned.
Regulated entities who have access to tools or information not available to retail investors, or who applied financial pressure to manipulate access to the markets, or did not disclose conflicts of interest...that seems like a much easier case to make.
We will probably see a few retail traders get burned, and I suspect anyone wanting to do trading in the future is going to have to fill out more disclaimers.