But with SpaceX's market cap of $2 trillion, I'm just not sure how much long-term upside there is to the stock at this point. If you're looking for exciting growth investments with huge long-term potential, the two stocks below may be better options. I am a huge fan of SpaceX (SPCX +7.15%) as a business. The company has an incredible track record of lowering the cost of launching payloads into space. And SpaceX's biggest growth initiatives -- which include everything from launching data centers into space t ...