[meric]

You can buy Google as a proxy. A poor proxy but proxy nonetheless. The "plus" side is Google might make similar investments in other ventures like this so your bet on space is more diversified.

[mmahemoff]

Tesla would be a more direct proxy surely. (A $1B investment is about 0.3% of Google's total value.)

[reneherse]

Except that Tesla as far as I know has no ownership in SpaceX, while Google now does. My interpretation is that the OP is not just looking for an investment in Elon Musk, but specifically in his space venture.

[djloche]

If you believe in and want to invest in the SpaceX venture, you'd probably want to be investing in a basket of SpaceX related material suppliers.