Why does making the world a better place make you think of Elon? I think of something much smaller scale. Helping my community, elders, people around me. Something at a much smaller scale where I get 1-1 human interaction out of it.
My passion is in fitness. I want to be active in my 60-80s (weight lifting / marathon running shape). I ultimately want to help others do the same and lead a better quality of life through their old age.
but, not the only one.