Look at Tesla. The intrinsic value was no more than 10 billion before he started sieg heiling on national TV and alienated half of the western world.

My conspiracy theory is that Musk gave multiple investors billions of his personal cash to invest in Tesla stock at key moments. He tells his straw purchasers when to buy hundreds of millions worth of stock in order to pump the price and kill those who short the stock. This scares the shorters out of the market and ultimately removes a natural source of downward pressure on the price. They sell off what they purchase all at once relatively slowly so they can then do it again.