Evolution works based on incentives. Until now, the only incentives for AI software were artificially defined by programmers, arbitrarily telling software "this is good and this us bad." With Bitcoin, AI now has a natural, objectively measurable positive and negative incentives for its decisions and actions. This may actually greatly speed up the development of AI...
It is still artificial. Bitcoin is not part of the natural world. It is a contrivance like all of technology.