It has been two years since cannabis companies fell into a pothole of investor disillusionment. Stock prices, valuations, and even some company managements, have disappeared down that dark hole. Some investors are betting that the time is right to get back in. During the peak mania for marijuana stocks, I warned readers that while I thought the long-term prospects for the cannabis industry were positive, valuations had reached impossible levels. That proved to be an accurate analysis. Since then, all the pie-in-the-sky forecasts of industry enthusiasts failed to materialize, leaving in their wake a trail of lower sales and disappointing…