Re: What will happen to BTC if there would be an apocalypse?
Can Bitcoin Survive the Coming of the End of Days? As long as there remains a single node running Bitcoin, the network will continue to operate. Even the most devastating nuclear attack is unlikely to destroy a significant number of nodes.
You said it yourself, this is the end of days, and trust me, people wouldn't be thinking of Bitcoin then instead it will be all about surviving for the remaining people that survived and what happens if those people are not Bitcoiners 
just a thought a well. It would definitely take a long time if there is such an event by the survival to restore the network.