We are in the process of delegitimizing cars, weapons are already taboo and illegal in liberal cities, Congress keeps trying to open phones to law enforcement, HN is enamored of European-style privacy laws that make it an onerous legal liability to have the capability for audio recording (or any other data collection), and drones were heavily curtailed by the FAA with widespread public support.

We already have currency, and it works much better than any cryptocurrency. The specific problem cryptocurrency solves is vulnerability to law enforcement (i.e. central control).

I would also be concerned if someone started selling weapons whose defining feature was their resistance to homicide investigators.