There are a lot of reasons why the Comedy Central animated series "South Park" has been on the air for so long. First and foremost, they've kept in strong since 1997 by keeping it real and topical. They evolve with the times, and focus on what's trending at that given point. Last season, they shifted their focus to the fictional Tegridy Farms, and made a new main character, in Stan Marsh. Tegridy is a marijuana farm, and their shifting to this topic is reflective of how big a boom these businesses are seeing. CBD, Hemp, so-called "pot stocks," it's a family of industries set to skyrocket. CBD Stocks could be a smart investment play this year...