Heading into 2021, Robinhood seemed like it would be one of the year's most promising initial public offerings, or IPOs. The company's trading app gained tremendous market share with younger traders thanks to its game-like features. Robinhood has enjoyed massive amounts of free advertising on social media as people make videos about huge wins and shocking losses on the app. Reddit's WallStreetBets forum helped launch Robinhood into the stratosphere.