SpaceX’s long-awaited IPO prospectus was revealing. Here are some key takeaways.

The company is on track to pull off the largest IPO in history — making CEO Elon Musk even wealthier.

Elon Musk plans to take SpaceX public with a valuation of nearly $1.75 trillion. This ambitious figure is drawing scrutiny from Wall Street analysts. SpaceX's potential lies in…