What are your thoughts on marijuana stocks?

I had some thoughts about this but I forgot what they were.

Marijuana Stocks are primarily penny stocks right now. With Colorado beginning to sell recreational marijuana on January 1, the stocks soared 200%-400% in a few days based upon that and not any actual company news. The stocks have since plummeted and will probably continue to fall. If you really wanted to gamble on these penny stocks, my suggestion would be to wait until April/May, buy when they are all really low, and then sell in June when the state of Washington begins selling marijuana recreationally.

I saw this article about banks not dealing with pot dealers for fear that fedgov bank regulators might shut them down for aiding and abetting federal criminals.

After all, pot is still against federal law.

So, why should a regulated stock exchange feel comfortable trading their shares?

Banks reject pot $$$