On the other hand, with all the VC money flowing into bitcoin why don´t any of these entrepreneurs do anything to stabilize the price of bitcoin? They sort of depend on bitcoin being an attractive proposition.
Just look at the pump from 300- to 400+, why they did that? Profit. You may think they are net buying during a pump but that is seldom the case. Regarding venture capitalists, most of them are rich kids that will lose all the money their dad has hard-earned during a lifetime. Some of them get lucky, once in a while, but that is all. Do not count on them stabilizing the price.