Millions of houses, thousands of jets, every NFL and NBA team - imagine the things a trillionaire could buy Μake us preferred on Google The initial public offering for SpaceX could make Elon Musk the world’s first trillionaire. Just how wealthy is the tech founder? His fortune now stands at roughly $970 billion, mostly in stock, according to a Wall Street Journal analysis. Accumulating that amount over his career averages out to $992 a second.