I think more precisely, plenty of billionaires put money into these things, but it’s too often to little effect due to lack of direction/clarity in the organizations the money is being poured into, too little money being put in, or both. What makes Musk (and Bezos) different is the laser focus and zero hesitation to commit huge amounts of cash to said goal. Where others would be happy to say, “oh well, maybe tomorrow” Musk is always asking, “why didn’t this happen today?” and acting on the answer for better outcomes in the future.