That growth has been helped by the legalization of cannabis maake Canada and a lengthening list of states. For those who are looking to profit from pot, either through investing or other means, the time is. Here are four ways to make money from legal marijuana. The marijuana business is no longer an underground network. Instead, you now find marijuana-related companies listed on major stock exchanges in the U. S and Canada. Several larger marijuana companies in the U. Not sure how to get into investing?