All the GPU's have already more than ROI..once KNC/Alpha ever ship I will mine Vert or whatever is good at the time.
Thats one of the main advantages of GPU's, they're not for a single purpose. When scrypt coins get rare you can still mine coins other algos not so much with asics.
thats assuming other altcoins are also being pumped. I think the market is tired of all the pump and dump altcoins. I dont see any altcoin that gives profitable mining. Might as well buy them if you're into pump and dump