It's not the Bitcoin value that's making it become unprofitable, it's the network difficulty.The chance of finding a scrypt coin such has Litecoin has dropped to the point that it's currently barely profitable over the cost of running the miner at the power prices I pay (~22c US per KWh) It's design for this to happen, I think they've missed the boat entirely with this otherwise nice hardware.12months ago it would have been a worthwhile investment.