Better question why hasn't anybody with 1 million + bitcoins started a commodity fund on the NYSE, TSX or other exchange. That's how gold and other commodities are traded and price determined. Would remove lot's of market manipulation if traded like every other commodity though then you'd be trusting wall street T Boone Pickens hacks to not screw us all over, but at least there would be transparency and some sort of regulation to prevent a big trader on Gox doing whatever they wanted