This is why I hope, really hope, that bitcoin or some crypto currency becomes a stable value store, pushing people away from the likes of Gold, diamond. Almost all these resource based value stores are exploited - gold, diamonds, oil, animal skins, etc. There seems to be no end in sight to check the illegal ways of extracting these resources, since the profits are so high. The only way ,in my head at least, to check the illicit activities is to shift that value to something else which is not amenable to such exploitative extraction.