I have read about Colorado being legal in state but the banks won't accept the money because it is illegal Federally and they don't know how to handle this situation. Marijuana should be legal on the Federal level.
http://townhall.com/tipsheet/leahbarkoukis/2014/02/03/colorados-pot-tax-...
http://www.foxnews.com/politics/2014/02/01/colorado-pot-tax-revenues-cou...