Anything that can impact a countries control upon their own currency has the potential to destabilise things.

Now whilst cypto is another currency, it is one that is very volatile and as we have seen, anything that volatile in a currency is always never good for the majority.

Also to have any impact, such crypto's would need to become more widespread and whilst in geek land we may view things as common usage, your average citizen probably at best only just aware of their existence. Indeed I'd hazard a guess that most people in any country have never held currency beyond their local offering (though the dollar sure does come close and that in some countries).

If a government has a monopoly on violence, then its citizens have no recourse to correct an evil or corrupt government. History shows time and time again that this is the case. In the case of the USA -- I don't think anybody here should want our government to have a monopoly on violence, given the USA's violent history. Trading such liberty for a sense of false security is unwise, in my opinion. The USA's founding fathers knew this.