I've got a dozen gold sovereigns. You pay a premium over scrap for them, but scrap price now exceeds what I paid so all good. I thought they might come in useful if things go to hell in a handcart here and we have to get to relatives in Texas (just as an e.g.) to pay the ferryman. then I thought we might need some small change so I bought 100 one oz. silver coins (which you don't pay a premium for as such, although you do pay VAT unlike gold). Whether they will / would ever serve that purpose idk, but it's a useful function of coinage, that you can't really apply to artworks, fine wines, persoanl number plates, etc.