I would say 99.8 % ,since only on the mint voting page we have 400 coins .. add the dead ones , those in progress...
Lets be honest.
We have BTC, LTC and what is next... are we sure that Darkcoin will still be in market next year? I don't think so, and what about Blackcoin, same here, it is now popular, but what about next year. Dogecoin was so popular, now nobody talks about Dogecoin anymore. The only coin that you hear is BTC and sometimes you hear LTC, and all the other coins are coming and going. Earthcoin was a hype beginning of the year, no nothing. What happened with Zetacoin, FTC, Namecoin, etc
Remove all those pumps on mintpal and 90% of the coins listed there are in fact dead. But that is altcoin world, everybody knows. A few will make big profit, and a lot will be too late and lose.
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http://www.reddit.com/r/dogecoin/
530 online users
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Don't drag namecoin into this mess of copy clones