Of all the alt-coins ppc is the only who could one day compete with BTC. I'm not saying it will, it's highly unlikely.
I can't imagine PPC encroaching on BTC during the days of POW reward being the newly minted coins. (The next 10 - 20 years)
PPC will only show its true colors in a decade or two when POS shows its superiority over POW. (Then again I could be way wrong and the transaction fees are the way to go, forever...)