Wanna know what I’m going to use?
Ammunition. Always popular.
Canned Food. Bit heavy, yet who’s going to care about sell by dates.
Cigarettes. Round the world the humble cigarette is universal cash.
Pills / Meds. Especially antibiotics and pain killers.
Salt. So useful, so versatile.
Bling! Because some bloody fool will trade in it.
Forget coin, forget ingots, and paper currencies.
The only thing that will matter eventually is if you have:-
Something useful or a good pair of experienced hands.