> Extortion in the form of ransom-ware, theft in the form of stealing bitcoin from exchanges. (Mt. Gox, and a more recent case.)

This is exactly what I meant. I guess I could have been more clear about that.

I don't have any data to back the assertion, and honestly I kind of forgot the markets were still extant, I just happen to know that people are making millions in illicit profits from these two methods, and I've never heard of a successful preminer (which was how I interpreted "Ponzi scheme") other than Mr. Nakamoto.