IMO has anybody ever heard of SILVER?! Umm, talk about its growth potential compared to others as a commodity.
BTC is a "fun" play but I wont put my 401K into it. Just enough to get an ulcer though.
According to my calculations silver and gold are both over valued right now. If Bitcoin was as universally accepted as gold and overvalue to the same extent it would be worth around 1.5 to 2 million USD per coin.