Until this change, marijuana businesses have spent years growing and expanding in an adverse environment.

While legalization — and the Federal government's recent decision to step back and not interfere through drug raids — will remove some of those inhibiting effects, there's still a lot that is keeping entrepreneurs down. 

Good news came this week, then, when the Justice Department announced it was reviewing its policies on banking restrictions for marijuana companies, according to NBC. This, moreso than almost any other federal action, will help the marijuana economy develop unimpeded.