(0.07%) Data source: Yahoo! Finance. Investors looking for successful plays in 2021 have had to be a bit choosier than they were in 2020. Yet while big gainers aren't as plentiful as they were in 2020, there are still a couple of areas that feature some huge winners. Below, we'll look at two industries that have powered ahead this year and have plenty of momentum for further gains throughout 2021 and beyond. 1. Marijuana stocks Marijuana has been a popular investing area for several years, but it got a big shot in the arm recently with the 2020 U.S. elections. A change in political party control of both the White House and the Senate has created a much more receptive environment for considering marijuana reform, including decriminalizing pot at the federal level. That's helped lift shares of the entire industry, with the