I wish I knew about bitcoin mining 2.5 years ago lol. Or earlier. Still kind of hard to wrap my head aroud it, though.
But yeah as far as I know, people are still going at it.
I'd also say that a GPU can make your screen look better. We stuck a 5770 in my gf's PC, which was running of integrated (Intel GMA, socket 775 stuff) and with the GPU in there the image was a lot nicer, more colourful.