Thank you for your comments.

I can think of a friend whose wife lived through multiple currency collapses (local money literally going to zero) and they always seen to adapt and survive. Old money is replaced with new money. I think that can happen again but instead of the loop, they could decide to use self-soverign money uncontrolled by the violence of the state.

Yes, it's possible internet and electricity grids may shut down, but the people running those installations want to feed their kids also, so I could imagine a scenario where they get onboard with getting paid in cryptocurrency also. That said, I do hope we move towards a more decentralized approach to electricity and connectivity.

If people are scared and freaked out, maybe cryptocurrency would be too much for them, that's a good point. I still think it would be easier than, for example, cigarettes though, as long as at least a portion of their network (15%?) were actively using it, accepting it, promoting it as a valid option, etc.