Nakamoto is most one or more of a group of Anglos who were living in Japan in 2009. The Pro-Ponzi argument is that it was founded by a mystery man, the early adopters (AKA Nakamoto) undoubtedly get the most coins for the least effort. Those of us now, especially those of us interested in mining are at the suspicious point where we can still profit, but there are obstacles (cash to make machines, space, time heat dissipation, electricity) and an attempt to over-come those obstacles will make us more likely to be scammed. Possibly a scam within a scam.
But.
I think the early adopters of bitcoin will make a tidy profit for themselves, but the openess of it, being able to look up each block chain and each transaction shows me it may not be a ponzi scheme. It shows me this enough that I have invested in mining hardware, made my own controllers at what could be a real loss for me.
It could be a scam. If it is, it is a good one. If it is not a scam, it is a revolution in currency and economy. If it is not faith, then it is risk. I am taking the risk. I do not have faith is a mysterious founder and in fact I am suspicious of him.