According to Oxfam, a 10% tax on Elon Musk's $1 trillion fortune could lift over 800 million people above the extreme poverty line. With SpaceX listing on Nasdaq, Musk became the world's first trillionaire. "With $1 trillion, Musk could give $100 to everyone on Earth, and he would still be one of the ten richest billionaires," Oxfam said.