Interesting read! I like to distinguish between altcoins whose use is primarily payment, altcoins that are application tokens and altcoins that are tokens of platforms/protocols. My take is the most growth potential lies in the latter. Today the big ones in the TCP/IP era are Amazon, Facebook, eBay, etc. Those are the applications on the internet protocols. With Blockchain technology it is vice versa. Ethereum and antshares are already showing the signs.