Ross Gerber, a former Tesla investor, now predicts a 50% decline in Tesla stock by 2025.He has expressed concerns about Elon Musk’s focus, Tesla's Full Self-Driving capabilities, and vehicle sales.Gerber believes Tesla's autonomous taxi network launch deadline is overly ambitious.He criticizes Tesla's reliance on cameras over LIDAR sensors for autonomous driving.Gerber mentions Musk's divided attention among various ventures as a drawback for Tesla.He points out a decline in Tesla's vehicle sales and competition from other EV makers like BYD.International markets show a decline in Tesla sales due to Musk's association with Donald Trump.Gerber highlights Tesla's premium valuation compared to its peers and foresees a potential 50% drop in stock value.JPMorgan also maintains a bearish outlook on Tesla with a $135 price target.Given Gerber's history of selling Tesla shares and concerns, he sees a challenging year ahead for the company.