The SpaceX CEO's fortune on paper now rivals the annual economic output of many countries, according to World Bank data.
Elon Musk has become the first person to cross the trillionaire threshold, at least on paper, after SpaceX priced its blockbuster initial public offering at $135 a share.
Before the IPO, Musk was worth an estimated $813 billion, a fortune more than t... [2024 chars]