Well, isn't that the essence of stock trading? Spekulation, taking risks based on assumptions and so on?
In this case its the assumption that Hemp products will get taken from the illegal drugs list. In some countries it already has, and even in some states in the US. I guess the possibility is there that it happens.
If it really happens - and if the USA legalize it, a lot of countries will follow soon - it will become a mega market, probably bigger than the beer industry.
And if it happens, you are either one of the early birds who catch the worm, or you belong to the masses who try to jump on the band waggon too late.