NVIDIA Corporation was hardly worth anything before it launched a successful product and proved itself.
The valuation of any startup will not be too high, even if it may become a renowned giant in a certain field in the future.
But this does not mean that Dean could just spend money to buy a major share of the entire NVIDIA Corporation.
This isn't about capital but rather that he must adhere to the rules of the venture capital game.
The reason founders put their heart and soul into the development of a startup is that they know they will receive substantial returns if the company succeeds.
This premise requires them to hold a considerable percentage of the company's shares, usually no less than 30% during the first and second rounds.
Otherwise, before the company goes public, at the dawn of success, capital comes in to pluck the fruits.
If that were the case, why would founders even try to make the company succeed?