Elon Musk is about to float SpaceX. The resulting float will make Elon the richest person in the world. I did think about buying shares but they will float at about $135 US each which is a bit too much for me. What does being the richest man in the world feel like? We're told money doesn't make you happy, I'd love to find out if that's true. I would buy a house for each of my children then build a hospital and a nursing home. So what do you spend your money on when you are the richest person on earth?