I mean, the US federal government doesn’t have an internally consistent stance on cryptocurrency regulation, with different agencies in conflict as to whether a securities or commodities regulatory framework applies. And no consistent clear determination has been made. It’s currently effectively impossible to get actionable legal advice about how to follow the rules, which is different to the situation with the FDA, EPA, et al.

You could say that the conclusion is then that it’s all illegal full stop and that all cryptocurrency related businesses in the US should cease operations immediately. But if that’s the case, you’d hope that would be clearly expressed somewhere. Right now, the rules (or rather, the probabilities of facing adverse legal action) are being inferred after the fact by analysing patterns of enforcement action.