Tesla's board has warned that Elon Musk could quit as CEO if the $1 trillion pay package isn't passed.JOEL SAGET/AFP via Getty Images Elon Musk's wealth hit a record $648 billion, extending his lead as the world's richest person. His fortune jumped thanks to Tesla's record stock rally and SpaceX's soaring valuation. Musk has gained an unrivaled $216 billion this year, more than Bernard Arnault's net worth. Elon Musk's net worth has surged to a record $648 billion — and his wealth gain this year exc ...