In the following video, Motley Fool analyst Charly Travers takes a question from a Fool reader, who asks, "Now that marijuana is starting to become legalized with some of the states, I believe that eventually the federal government will legalize marijuana also. If it becomes federally legalized, then I believe the tobacco companies like Altria, Philip Morris (PM -0.54%) and Reynolds American (RAI), and so on will start to get into this also because they already have the infrastructure and capital to produce and distribute tobacco. So my question is would it be a good idea to begin speculatively investing in American tobacco companies soon so to capitalize on the potential of the marijuana industry later?"