Milan, 16 December (LaPresse) – Elon Musk has become the first man in the world with an estimated net worth of $600 billion. According to Forbes, Musk has just reached this milestone thanks to the sharp rise in the value of aerospace company SpaceX. The company is currently valued at $800 billion, up from $400 billion last August, with Musk's wealth (who owns 42% of SpaceX) increasing accordingly by $168 billion, for a total of $677 billion when counting Musk's other assets, primarily his shares in Tesla.