All of Bitcoin's rules require math only and no electricity. As I said, it's impossible to place transactions in blocks without electricity. However this is always impossible with gold. So, without electricity, Bitcoin will merely fall back to the less efficient solution used by gold. I don't think I can spell it out even more.
Gold doesn't require a "block", math or anything digital to be used as a medium of exchange. And I don't know anybody who can solve "blocks" math problems by hand so, your argument is garbage.
Without electricity, there is no mining and without mining, there is no way to prevent double spending. So, without electricity, Bitcoin is worthless numbers written on a paper. Sounds a lot like our current paper fiat. I'll stick with gold in such a situation, thanks.
Are we talking about a post-apocalyptic future, where don't expect electricity to return?
I'm pretty sure everything will lose value, except food and other necessities. (maybe bottle caps, got to start saving those). Otherwise, I think Bitcoins would survive a 1 or 2 day power outage.
