I am noob to and here are my noob answers.
GPU mining on bitcoins is a loss because electricity cost is more then gain even if you do pool mining. The other coins maybe possible still but you have to believe they will stay around for the long run like bitcoin is destined to do.
But what are the other coins? If f.exampel BTC=dollar, is LTC=cents or is LTC some other kind algorithm?
And can you use USB ASIC for both BTC and LTC and other coins?
USB ASIC mining is still profitable if you live in area with low cost electricity, maybe say 15 cents or lower per kWh.
In Denmark it is 40 cents per kWh. Crap
USB Fury still profitable even at higher cost electricity.
So mining in Denmark is not profitable. I guess.