How and why would the end of bitcoin (and any other cryptocurrency) occur? Value decrease? Legality issues? Different technology/ideas to supersede it?
I think the Internet has been shut down, so bitcoin will die. The circulation and trading of bitcoins requires the Internet. Without the Internet, people will not be able to trade bitcoin, and its value will soon become zero.
The lack of internet connection will not be the reason why Bitcoins die, even without people accessing their bitcoins, it's value is going to stay the same for all that period especially since people would not be able to sell and buy during that period.