I read somewhere (it may have been on Selco’s pages) that one of the best things you can have when SHTF, in addition to necessities, is a bag of gold bands. Not too fancy, just plain, and it’s less expensive to buy thin ones rather than thick. It was put just like Selco said, above, because you can wear one around at all times (instead of carrying your stash), then make it seem sentimental to you if you have to part with it for barter, to increase your advantage. Then just go home and get another gold ring for next time. That way nobody suspects you have a stash of riches, assuming you spread out your bartering. This is not an expensive stash to build up, done this way over time.