Elon Musk became the first person with a net worth of $500B after Tesla shares climbed on October 1; Musk is $150B ahead of runner-up Larry Ellison (Matt Durot/Forbes)

Matt Durot / Forbes: Elon Musk became the first person with a net worth of $500B after Tesla shares climbed on October 1; Musk is $150B ahead of runner-up Larry Ellison  —  Musk is now half-way to becoming the first ever trillionaire.  —  Elon Musk achieved yet another major milestone […]