The vast majority are busy running the businesses that made them billionaires. Perhaps we just need to look more closely at the list of billionaires "running t

The vast majority are busy running the businesses that made them billionaires. Perhaps we just need to look more closely at the list of billionaires "running the businesses that made them billionaires"? Making a spaceship certainly sounds (and is) sexy, but those spaceships are built on top of other technologies like material science, energy storage, communications, etc (and those in turn are built on other technologies like extraction and manufacturing). I'd bet a number of those "businesses that made them billionaires" are working on that kind of tech, but those technologies don't generate the kind of headlines in mainstream media outlets like self-driving cars. It's the difference between developing packet-switching technologies and Google fiber. You can't have one without the other, but only one sounds exciting.