Earlier quoted context omitted.
This is really the heart of the matter. On hand , yay, great we can subvert nasty states using cryptocoin, but also could undermine legitimate democracies. Swords cuts both ways. No one can deny the wave of ransomware and cryptocoin are not related. How do we balance it so it can provide a net positive for humanity?
Yeah, nobody ever asked for ransom before cryptocoins. /s Legitimate democracy can't be undermined by an international currency not controlled be the government. In fact, it can be reinforced by it. This issue is very similar to free speech: the good it does by making the government unable to silence political opponents far outweights the harm done by extremists and lunatics of all sorts.
And no, it is not at all similar to free speech. Cryptocurrencies do massive harm - to the environment, to innocent people losing their money to scammers and frauds, and to the entire economy through enabling ransomware - and tiny, tiny amounts of good, which dwindle in comparison to the harm.