Not everyone attending the 2016 Cannabis World Congress and Business Expo is stoked about Proposition 64 – the ballot measure to legalize recreational pot. Take Virgil Grant, for instance, who’s already in the cannabis business. Grant has had an up and down experience in the marijuana industry so far. He is one of the original medical marijuana dispensary owners in LA, but that got him into trouble with federal authorities and he ended up spending six years in federal prison. Now he advises caution, and he’s skeptical that legalizing recreational weed now will be a good thing for people like him.