With the SpaceX IPO, Elon Musk has become the world's first trillionaire. If he was able to get an annual 5% return on that money (which is mostly in stocks, of course), he would be earning $137 million per day or $5.7 million per hour without having to touch the principal amount. What do you think is the dollar amount of a business (or any other) deal that would catch his interest? Would a $100 million deal be worth his time? $500 million? Hard to imagine how this man looks at money these days.