The maker of innovative EVs has been a long-term winner for shareholders.Tesla (TSLA 2.27%) continues to take investors on a volatile journey. While shares have soared recently due to founder and CEO Elon Musk's $1 billion stock purchase, this remains a very polarizing business. There are valid arguments coming from both bulls and bears as to Tesla's merits as an investment.Is this top electric vehicle (EV) stock a buy, sell, or hold right now? Concerns around valuationIn the past decade, Tesla shares have ...