I'm guessing that most, if not all, of the people who hold those shares that became tradeable today also have/had other shares that they've bought on the open market. If this is the case, then if they wanted to sell anything, they could have already sold their other shares by now instead of waiting for the pp ones to become tradeable. I might be wrong, though. Either way, I don't see why anyone wouldn't want to hold on to their shares given all the potential here. Unless, of course, you feel you could make more money elsewhere. In my mind, though, this is definitely among the more interesting plays out there right now.