GLD is 500-800% over September prices, so it's only low relative to the prices paid during the recent frenzy. But, yes, it does seem to be a bit low...
I think there may still be significant regulatory pressures on crypto (hard getting money into exchanges, no USD -> BTC on Cryptsy, can't sell on eBay, Casascius shut down), such a lot of buying that would otherwise be happening is not happening right now.
There's also the recent idea of unlimited coin generation (
http://coingen.io/status.html), and the market needs to come to terms with that before some investment decisions can be made. Will new coins be made when it is no longer profitable to mine the old ones? Will they be adopted? How does that speak for the value of altcoins?