tbf those investments weren't traded on a liquid market, and I suspect Founders Fund are less worried about short term setbacks than your average mutual fund or mug punter.

But of course we also know that Musk-run public companies are immune to normal dynamics of worrying about next quarter's returns (or even worrying about the CEO publicly torching his brand equity) so the very last thing I'd imagine happening is SpaceX becoming risk averse and profitability focused