I called several banks in Washington. I called a local credit union, a tiny bank in the San Juan islands. Everybody said basically the same thing. Even if selling marijuana is legal under state law, it’s still illegal under federal law. And banks and credit unions worry that this could get them in trouble.

So people who want to go into the marijuana business — who want to legally grow, distribute, sell marijuana in the state — are going to have to operate, basically, like drug dealers. They’re going to have to run a cash business.