[hashkb]

Don't you need the armies to protect the infrastructure that powers bitcoin? And if you get to the point where you don't need armies, do you need a massive global network to verify you can trust the people you're doing business with?

[superkuh]

Bitcoin infrastructure is distributed widely across the world. No single country disappearing off the face of the earth entirely would take it down before the internet itself went down.

[noxer]

Assuming Thanos would snap away China (the whole land not just the people) bitcoin definitely could be considered "down" because it would no longer mine blocks every 10 minutes on average. Difficulty does adjust but that take weeks. the internet would not be effected like that.