Thats why POW coins are not sustainable.
NXT has a real future once the jolly things get distributed, since no expensive mining farms are required.
There is not enough room for all these altcoins, there is only enough room for 5 or 6 coins max i reckon.
Most of these coins will be dead in 12 months, the hard thing is trying to predict what ones will be successfull.
I do see some future in darkcoin, so im mining some, but i think its going to be easier to pump and dump other altcoins into darkcoin, since its difficulty is so high, i wished i mined this at the start, i could have got 400 coins a day!
But that always seemed like a cop-out to me . . in that all I can think that was said when it was started was: "Well we can't figure out how to make it decentralized so we'll just start at the end and move toward the middle."
I respect the effort as a whole and hope it finds true growth, but it's basically like someone telling me: "I am rich now because I made a stake a long time before you did, and you should do so now so that you can spread the word." Just doesn't sit right with me.
Just because PoW coins are susceptible to the same centralization that NXT started with doesn't mean at all that it's not sustainable. It just means that nobody's came up with a way to slow the process to a complete crawl yet. I'm not ready to say, and probably never will be ready to say, that we should just abandon a PoW concept.