Musk is now half-way to becoming the first ever trillionaire. Elon Musk achieved yet another major milestone Wednesday, becoming the first ever person worth $500 billion. The richest person on the planet is now worth $500 billion, as of 3:30 pm Eastern, per Forbes’ Real-Time Billionaires tracker. Musk, who became the first person ever worth $400 billion or more in December, is $150 billion ahead of runner-up Larry Ellison—and half-way to becoming the world’s first trillionaire. Shares of Tesla c...