Skip to Main Content This Landmark Cannabis Bill Is Great News for Marijuana Stocks Investors would probably struggle to find an industry that’s growing at a faster and more consistent pace than legal marijuana. Last year alone, according to cannabis research firm ArcView, North American legal pot sales jumped 34% to $6.9 billion. ArcView estimates that legal sales could top $22 billion by 2021, with investment firm Cowen & Co. expecting legal sales to hit $50 billion by 2026. Regardless of what estimate you choose to believe, the legal marijuana industry is growing by between 20% and 30% a year. That type of consistent long-term growth is certainly appealing to investors. Image source: Pixabay.