And now you've stolen the company he founded and self funded with a hundred million dollars and given it to venture capitalists and hedge funds, because of some perceived and unrealized gain.
It'd be the same for any person with a meaningful stake in a company.
Your basically advocating that once a company reaches a certain size, the founders and possibly the early investors have to give up their ownership and the influence that offers.
Edit: a company like SpaceX and countless others simply wouldn't exist under rules like that.
Edit: and that size is literally at the whim of the markets since stock values dont represent the current day value. Imagine a company being led by a founder and hedge funds scheme a plot to raise the stock price through something like a gamma squeeze to force the founder to sell shares from that temporary gain, so they can do a hostile takeover. If thats possible, itll happen.