Interesting post. The truth is that none of them would have as a goal to reach that figure, but if we think about it, Elon Musk is the most likely to reach it, since the potential of his companies and what they could achieve (especially SpaceX) is so great, that the trillion dollars could be possible. PS: just today I also uploaded a post about Musk and his history, it is very interesting the mentality of this man and his ambition to do the things that are important, what nobody has ever done...