You didn't say anything about medical marijuana. You stated your belief in the possibility of the feds re-criminalizing marijuana (quoted in your points 1 & 2 below). Again, most here will not disagree that marijuana should be legal, but the fact remains that despite what states may decide to do with regard to marijuana laws, it will always be illegal until the feds revoke it's illegality. Even in states that legally allow medical marijuana, you'd damn well better have a prescription for it if you're caught with it or you're headed for jail.
1) If they re-criminalize weed, that means all those for-profit prisons will fill up again. Cha-CHING.
2) If they threaten to re-criminalize weed, it may scare the small business owners who make up the industry. Then the corporate interests can move in and take over. Cha-CHING.