Read it here! Musk holds a stake worth about $866B in SpaceX (SPCX), which is selling 555.6 million shares for $135 a piece, according to the Securities and Exchange Commission, putting the company at a $1.77T value and making it the seventh most valuable U.S. company, ahead of Tesla! Source: MSN
He has enough wealth that if you were an immortal born in 1AD and earned $1,000,000 every single day, and never spent a single penny, you would still not be as wealthy as him today.
There is absolutely no justification for any single human being to hoard that much wealth.