Lets face it, BTC is going to die sooner or later for GPU miners. As a few have said, anything SHA based is pretty much stuffed.
Then scrypt will face similar problems with the increase of GPU miners switching, difficulty will increase making it harder for small time miners to stay in. Only the heavy hitters will stay afloat.
The surprise for scrypt miners will come when mining scrypt is not profitable either. Who would trade ASIC earned BTC for GPU earned LTC at an effective loss? Yes I do believe the LTC economy is just an accessory to the BTC economy and can't stand up on its own right.Then scrypt will face similar problems with the increase of GPU miners switching, difficulty will increase making it harder for small time miners to stay in. Only the heavy hitters will stay afloat.
But I guess if it helps me sell off the rest of my 5xxx... I have 4 left out of like 20 a month ago.
ed: oh, i'll still be profitable next difficulty cycle, assuming price stays > $100..... about $400 after elec. after figuring in "standard" equipment depreciation, $200-$300? not worth the effort, but I guess it's not a loss waiting for stuff to sell