Elon Musk’s space exploration business thinks it’s worth $1.75tn, but some analysts value it at only half that

Elon Musk is the world’s richest man and another of his companies will go public this month

SpaceX is inviting investors to bet on Elon Musk's vision of AI data centers in space and humans on Mars. The sky-high valuation for SpaceX -- nearly $1.8 trillion -- is based on…