Card or cash that has a relatively stable value....
There is no way that a gold bug will ever convince a skeptic and vice-versa. For a lot of folks, a hedge against equities is bonds and a hedge against inflation is land. For me and mine, I hold physical gold and silver as my hedge. I don't buy it as a traditional investment vehicle. I am not "long gold", I am "really long gold". I don't care what the spot price is. If (hyper) inflation never comes, I will give my physical holdings to my son.
The last time that I bought gold it was about $800/oz. The last time I bought silver, it was $25/oz. Meh, I don't worry about it, because it isn't part of my "investment holdings".
Ukjeff brings up many good points about the value of gold being largely ephemeral on a historical perception. It is a valid point. But all stores of value (including money) are simply that because of the trust of the underlying system. If the trust in the fiat currency is lost, then the game is afoot.