Marijuana Stocks Arenât The Only Thing Exciting Vice Investors Right Now Those whoâve traded penny stocks really get to have an early look at emerging industries. I know you may disagree but let me explain my case. First, two of the hottest areas in the stock market today are renewables and electric vehicles. Blue-chip investors have their large-cap leaders like Tesla (NASDAQ: TSLA) and Cummins (NYSE: CMI). But when the hype was just beginning, speculation was going on in our world of penny stocks. This is when we saw the likes of Plug Power (NASDAQ: PLUG), FuelCell Energy (NASDAQ: FCEL), Gevo Inc. (NASDAQ: GEVO), Blink Charging (NASDAQ: BLNK) Nio (NYSE: NIO), and countless others gain heightened interest. Fast-forward a few months, in some cases about a year, and these former penny stocks are now getting mentioned as âthe next XYZ industry contendersâ. Theyâre also trading at much higher valuations.