Game changer for where? Globally? Locally?
Currencies like FRK are building strong foundations in their local small city communities, other currencies like doge are solidifying in with the anon trolls for the lulz (ya know, for tipping of course.. like the other currencies dont have tip bots lol), others like btc are working towards big merchants like overstock and trips to space. Each have their own reason to exist.
Yes... that's what I have realized as well.
I am definitely bullish on BTC, LTC, WDC, and QRK. These seem to have the most development behind them in terms of utilization for transactions between FIAT currencies across the globe. There is also PPC which is very nice as well. It seems many of the other coins will be specifically used for exchanging value between different online communities for purposes of crowdfunding... since all of these can be converted into BTC at the moment, and BTC is the main way to convert to FIAT, I want to be involved with the coins which have the most potential to integrate with FIAT currencies.
I am keeping my eye on Cryptsy's development of its' FIAT integration as well the QuarkPayments and Scharmbeck Worldcoin Financial Services.
We are entering the beginning of the end of banking as we know it.
The Doomsayers believe that governments will ban these currencies, but they cannot possibly do so unless they become authoritarian like the Chinese Communist Party and attempt take complete control of the Internet.
Therefore, in reality, the success of these currencies depends entirely upon keeping the Internet free and making sure governments don't try to fight.
I hope at this point, the less authoritarian governments will realize the more they resist change, then they will just fall behind the free world in human development.
BTC and cryptocurrencies may become critical in bringing the internet away from its' current wasteful Facebook social networking model to a real social networking that involves free trade and free exchange of ideas.