The smart play is goats (for meat and milk), ammo, and maybe some silver if you want some ready "cash". You can barter the meat/milk, and even the ammo (but it has other uses).

I would bury a bunch of gold coins and act like it's my last one from the family heirlooms anytime I spent one. Shaving off chunks of a gold bar makes it pretty obvious there's more at the source. But yeah, ammo will be the new currency.