Lack of complete credibility. There's a new alt coin every day with some scheme that's made to make it look better than some other coin. At the end of the day, no one really wants these alt coins, all they really want is something that is possible to mine and then exchange it for BTC. Why the alt coins have any value at all is beyond me...
+1
All of em are pump and dump and many aren't gonna survive for more than 365 days