It's a way to engage in activity that is superficially distinct enough that the law has not yet caught up with it, like driving for Uber or owning an AirBNB. It

It's a way to engage in activity that is superficially distinct enough that the law has not yet caught up with it, like driving for Uber or owning an AirBNB. It remains to be seen if the "innovation" in question is tangential to the main purpose (skirting an existing activity whose lawful bounds are already well-defined), or if it isn't, and the tech is instead truly transformative. You may think you know, but nothing really matters until a court, regulatory body, or legislature weighs in. Also Proof of Stake.