If that was the case the bust of DPR and the downfall of SR should drive the price of BTC down, to it's knees - since it was the only market where BTC was treated like a curency. This fact shows that either BTC is not as rational as one might think or that big players (or a small team of players) are trying to keep the price as high as possible (by not selling in bulk).
Note that if A. Shamir's paper is correct, and we don't have proof of the opposite, than 98% of BTC is owned by 2% of portfolios. IF that's the case, then it's no wonder it's over-inflated.
The sad thing is some people believe, that somehow this is more liberal while might complete driven, by a small team of unknown/anonymous players.
NOTE: I'm not stating that this scenario is real, but to me seems not far fetched at all.