CNBC's Jim Cramer said SpaceX investors are betting on Elon Musk's vision and track record, rather than the company's current earnings power.

One investor said that when SpaceX was privately held, he used a connection with a cousin of the billionaire entrepreneur to buy $10 million worth of stock in the satellite maker…

SpaceX is trading up on its first full day on the public markets. Here's what it has to do to maintain the momentum.