Why isn't bitcoin bigger in the Cannabis industry?

I work for a dispensary. Cannabis is still not federally legal. It's still a schedule 1. So banks wont work with us. We can't use anything but cash at the moment because card companies wont work with us. We had these Debit and credit card machines. But they are just a masking service so the card companies don't know you're buying Cannabis. But it fails constantly and the inconsistencies in the service working has lead us to get rid of it. I'm wondering why someone hasn't used bitcoin to solve some of the issues of the Cannabis industries banking issues and payment issues. Or have they? Feels like there's a huge opportunity here. Especially with how much I hear about freedom of transaction mentioned on bitcoin podcasts. But I also know most places don't work with us, so you might not be able to legally. Does anyone know if anyone is doing anything Bitcoin in the Cannabis industry?