Elon Musk just woke up $168 billion richer. Even as the wealthiest man in the world, he is still setting new records and raising the bar for what ultra-wealthy looks like. The serial CEO’s net worth shot up to$638 billion on Monday, making him the first person estimated to be worth more than $600 billion by Bloomberg’s wealth index. The 54-year-old witnessed an unprecedented wealth surge after SpaceX, an aerospace company he founded and leads, hit a$800 billion market cap in an insider share sale. Spac ...