If it helps, you're VTSAX 401k right now would only lose about 0.1% value if SpaceX dropped to $0. By June 2027 when all insider shares are unlocked it could go as high as 1.5%, but again only if it went to $0.

I hate Musk, I think SpaceX as an IPO was trash, and I disagree with the rule changes for index inclusion. But big picture, our 401k will be fine.