No. I have no idea if North Korean society has the necessary conditions, like globally integrated internet communities of appreciable size, where cryptocurrency can effect change.

I'm saying that censorship resistant finance reduces the impact of repressive laws around the world. It helps individuals circumvent laws like those instituted in places like Venezuela and China, that give the state enormous power over private citizens by controlling how they move money.

Stopping North Korea from using cryptocurrency would require very repressive laws to shut down entire global cryptocurrency networks, which in and of itself would make for a less free world because of the extremely heavy-handed enforcement actions that such a campaign would require. On top of this, the end result of such a campaign were it to succeed - of these censorship resistant networks not existing - would further undermine the goal of creating more free societies, for reasons mentioned above.