There is no "trillions that go into SpaceX". You and others seem to have a massive misunderstanding about how the stock market works... they could have sold 10 shares at $50 and still have a valuation in the trillions... Market cap does not mean they have that money in hand or even that it is being taken from someone else...

They literally sold less than 5% of the total shares in the ipo by the way...