World's first trillionaire Elon Musk said it's "not impossible" for him to become the world's first quadrillionaire, though that would require factories on the Moon and Mars. If Musk reached $1 quadrillion, he could spend $1 billion a day for about 2,740 years. Split equally among the world's population, it would amount to about $125,000 (around ₹1 crore) each.