One of the hottest growing trends on Wall Street right now is marijuana. The market is opening up in a huge way as it becomes legal in more places both medically and recreationally. I’ve made money in it from time to time as certain events (such as elections) have boosted the entire sector, but this is now an unprecedented mega-trend that is still in its early stages. Estimates of where the marijuana industry will be in the years ahead vary greatly, mostly because there are still a lot of unknowns.