Crypto is a good temporary stand-in, but would be useless in a post-apocalyptic war scenario. Default for no money is bartering, but bartering has it's limits.

Gold has always been advocated, but without a way to smell down or divide into smaller pieces, it would be a hard thing to trade for anything.

My greatest concern for cryptos is they're the prelude to 'one world currency' type bullshit. The fact it's inventor is anonymous and cannot be transparently verified makes me think intel agency or deepstate. Even the hash tool used in bitcoin (SHA256) is an NSA invention. Did no-one get the RSA 'paid to weaken encryption' memo?

NSA hasn't stopped advocating weaker and useless encryption standards.

Any currency of insufficient quality/complexity is easy to manufacture, forge, fake, mass-print. Any currency that can be printed can be inflated. Cryptocurrency has a good address for this idea - you can't spent what you don't have.

I'd back three horses: crypto, food supplies and bartering.

Realistically what you'd need to do is wipe the debt, create a new currency. We're moving towards a cashless society, so is this viable?