First trillionaire...fact is; we are still very far from this and it's possible the ones who are likely to attain this wealth status won't get to it. But in my opinion, we might see Elon Musk go very close to being a trillionaire, he is into a more sophisticated sector and more indepth technology. There are few competitors in his sector and if he achieves a monopoly and goes on to develop feasible products in this sector, we'll see his worth boom a lot.