I agree. Crime is not something that can be eliminated. But you can develop systems where its minimized and others where its maximized. The two extremes of totally policed, and not policable at all, are both examples of systems which will maximize crime. This seems obvious to me which is why I don't understand why people think a completely decentralized, anonymous, unregulated currency, with irreversible transactions is a good thing. It creates as many problems as it solves.