I'm an advocate of GPU mining. Graphics cards are one of the few devices which were able to mine
profitably for a relatively long period of time. Imagine a GPU bought 2 years ago, being switched over to
LTC and later to Doge at the right point of time. It should have made back 5 or 10 times it's initial
investment (in BTC and after deducting power cost).
GPU mining still makes sense nowadays with X11 or Groestl etc and trading the coins for BTC
afterwards. I'm not sure if it could be called a wise investment to build a big GPU rig
now. But if you have a computer with a free PCIE slot which is running anyway for some part of
the day, it's certainly better for a beginner to get a used graphics card instead of an overpriced
SHA Asic. You should also be able to sell that card later for a relatively good price.
But buying the coins you're interested in is maybe the best decision. But it's also a bit boring
if you get into bitcoins for the first time, no?
