Elon Musk, the prominent leader of electric vehicle giant Tesla, has confidently projected that his company could touch the phenomenal mark of $4 trillion in valuation. Such a bold prediction is, naturally, bound to attract attention, scrutiny, and both support and skepticism in the financial and automotive sectors. Behind Musk in this bullish stance is Ron Baron, a billionaire investor who has been a staunch supporter of Musk for a considerable period. Baron's optimism isn't restricted to Tesla. He anticipates even bigger returns when Musk's space venture, SpaceX, opens its doors to public investment.