My interpretation is that he would disagree with your definition of 'socially useful' in regards to black market purchases. I'm not saying Bitcoin doesn't prov

My interpretation is that he would disagree with your definition of 'socially useful' in regards to black market purchases. I'm not saying Bitcoin doesn't provide a value of exchange, after all, it could be said that the storage of gold for holding value is also not a 'socially useful' function.