That's irrelevant. By definition, Ponzi schemes involve some investors making a lot of money and others losing. That doesn't make them any less illegal. If so

That's irrelevant. By definition, Ponzi schemes involve some investors making a lot of money and others losing. That doesn't make them any less illegal. If some people are harmed by unlawful behavior, that is a reason to prosecute, just the same as if you mugged Alice and bought Bob an icecream with the proceeds.