They're obviously highly volatile and many of them have near nil profits if not significant losses. They have continued to dilute themselves with additional share offerings due to continuing to run out of money and failing to meet debt obligations. Weed inventory has been disposed of in many of the companies due to inventory far exceeding demand meaning growing capacity means very little due to a significant excess in supply.
Many of the companies have been struggling with previous distributors (drug dealers) undercutting and as a result cant make the predicted margin. A lot of the boom bust already took place and now its a waiting game to see who goes bankrupt and who does not since as with all things typically a few emerge on top and the rest are ether forced out of the market or bought at a significant discount.
Most of them are trash companies.
The one I choose to invest in was Scotts Miracle Gro. A well established company that dominates other segments and has a long-standing history well before weed. I definitely sold way to early since its near double when I was trading it but it is what it is. I would look for those type of companies though that have significant resources and other profitable segments as well as capacity to scale accordingly and operational knowledge.