People are being defrauded of magic numbers, not money.
It only just so happens that a lot of people with time and money on their hands want to trade magic numbers, which they deem to be worth money, but as long as they just a kind of fiction, then why we care?
Why should the US government spend valuable time, effort and energy hunting down the scammers among the hyper speculators taking incredible risks with their money with no benefit to anyone?