Let's say a massive nuclear war happens, all mining power is dead and we can't start building it again for a while. Could people run the blockchain by doing the hashes manually like this?
https://www.youtube.com/watch?v=y3dqhixzGVoWhat about nodes? how do you check funds and validate transactions?
Can Bitcoin survive without computers existing?
With a massive nuclear war, the problem will not be bitcoin or blockchain. There question will be if some people will survive? And if anyone survives, why they would use money (bitcoin or fiat) ?