Hot off of a $682 million acquisition, Adam Bierman, the CEO of MedMen — now the biggest cannabis company in the US — opens up about his biggest competition. While Bierman said he welcomes competition, big private equity firms are knocking on the marijuana industry's door, "and they'll come in and compete hard." Bierman outlines what it will take to see these multi-billion firms enter the market, and why retail is "the ultimate defensibility." The CEO of MedMen, the largest cannabis company in the US, thinks giant private equity firms could be his biggest competition.