I don't pay a lot of attention to iamnotback mainly because of verbal diarrhea(sorry iamnotback). He is one of our more well known characters for better or worse ... something like Spoetnik.
Hard to say if he can produce something unique. He might be the next "satoshi". Genuis comes in many forms and is often mistaked for idiocy.
Would I buy his coin? Hell ya. The entertainment value alone would be worth the few bucks. Can you imagine the shit storms?