The only true currency that will protect your family should the world fall into chaos is bullets, it is also a great investment, the price is likely to rise as totalitarian governments aim to eradicate large quantities of it and natural resources are exhausted together with inevitable wars and a human population that grows exponentially....
But believe what you want, we'll see if I will be willing to trade a .22 for your gold bar once/if shit hits the fan, it will be the most expensive caliber by then. Buttcoins paper and gold will be used as an irritating form of toilet paper by then.