I'd happily invest in SpaceX if they let me. Even if it counts as 'wasted' money in the books of some the simple fact that humanity would aspire to walking on another planet is worth backing. Robot exploration just doesn't feel the same to me. Hearing a 'roger' beep still gives me the willies and I was only 4 when the moonlandings happened. Nothing we did after that was as impressive to me, even though I'm sure it was easier to impress my 4 year old self than it will be to impress me today, walking on Mars would certainly qualify.