Well ... yeah. I have a bit of experience buying things, but know nothing about creating and running companies that design and build rockets. I'd probably buy Instagram too since the rocket thing would die in my ineptitude.
what about Jeff Bezos (ok, he's EE [yay, EE!]), or Richard Brandson (or it's really Rutan's brainchild)? OK, Virgin Galatic is child-play next to SpaceX, but it still demonstrate that billionaires can invest in AA.