Rivian (NASDAQ: RIVN) was introduced to investors with a bang: Its IPO was set at $78 per share, and the stock quickly zoomed to its all-time high of nearly $180. On the flip side, Rivian is flush with cash and its vehicles have been highly regarded across the industry, but Amazon's (NASDAQ: AMZN) nearly 18% stake in the company could pose a problem for investors in the future. Will Amazon pull a Ford?