But Interactive Brokers offers far more trading options, which makes it more attractive depending on your needs. We may receive commissions from purchases made after visiting links within our content. A projected four- to sixfold increase in worldwide cannabis sales over the next decade, coupled with triple- or quadruple-digit percentage gains in popular pot stocks over the past couple of years, is generally a good way to keep investors intrigued. Depending on how you trade, this could be cheaper than any other broker on this list aside from Robinhood. Millennials have long had a more favorable view of marijuana, relative to their parents and grandparents, and they’ve also welcomed high-margin derivative consumption options like oils, edibles, infused beverages, vapes, concentrates, and topicals, with open arms. Image source: Getty Images.