Jeremy Grantham warned that SpaceX could become a "future joke" even as JPMorgan forecast 91% annual revenue growth.

A market expert tells Benzinga why there's caution for the short-term valuation of SpaceX, but a long-term buying opportunity.

Plato’s Dave Allen warns the world’s hottest company has the valuation of a meme stock, while Minotaur’s Thomas Rice has already started shorting the shares.