YES!!!
This is the biggest weakness with using Bitcoin - if the electricity goes out or you're unable to reach the blockchain, your funds are not accessible (they might as well be worth nothing).
But, Bitcoin was never designed to be a doomsday currency. It was meant to be a more fair, more efficient way to conduct current financial transactions.
This is the beauty of it, it won't need to replace fiat (nor should it) because fiat will always be necessary in emergency situations. This will help prevent the rulers of fiat currencies from meddling with Bitcoin.
You know the only currency that would work in a doomsday scenario? a 12 gauge automatic shotgun. Im sorry but if anyone expects people to start trading gold coins in the middle of a post apocalyptic doomsday scenario, I think you have too many hopes.
Such a scenario is pretty sci-fi, so I don't see the worries. If electricity fails humanity failed.
If the grid goes down, there will be many graver problems than BTC not working... And, I don't care if BTC could theoretically work, NO ONE would want Bitcoin in a lights out.
But, the grid going down (long-term, not just hurricane damage, etc.) is not likely.
I do think that gold would retain value, but there is much to say for common-use ammunition. I would add "
.22 LR" rounds, they are small and super-cheap.