The metric of "legitimate transactions" is interesting, but I don't see an easy way of tracking it. http://coinmap.org/ http://coinmap.org/ tracks brick-and-mor

The metric of "legitimate transactions" is interesting, but I don't see an easy way of tracking it. http://coinmap.org/ http://coinmap.org/ tracks brick-and-mortar retailers that accept bitcoin. Maybe there should be an opt-in registry, like a global Bitcoin YellowPages?