Personally it makes me nervous that it might get stolen. I am slowly trading my silver and gold for bitcoins. It is difficult to trade because once again I am worried about it getting stolen.
It certainly can. I often use gold and silver as a direct medium of exchange, and there are 6000 years of history of it being used directly for trade.
When fiat based currencies fail it will be the paper that cannot be exchanged, the metal will be in high demand.