There will be a lot of "We should shut down the cryptocurrencies" from different perspectives (combatting crime being one) before it actually happens. But it wi

There will be a lot of "We should shut down the cryptocurrencies" from different perspectives (combatting crime being one) before it actually happens. But it will likely happen, starting with the US and the EU when it becomes a perceived threat to fiscal policies or national strategic interests, whichever comes first. Within 20 years is my guess, but could be much sooner. What the fallout and consequences will be is harder to predict. I could be wrong of course, some anomaly might be buried here. But almost a lifetime of experience tells me the state structures will protect their interests when threatened. And this has the potential to be such a threat at a certain scale.