A couple of things have happened in the past few days. First, in anticipation of the block reward halving, the price of DOGE shot up quite a bit -- from around 0.0000016 BTC/Doge to a current 0.0000025 BTC/DOGE (and a high of as much as 0.0000029 or so). If you were mining and holding DOGE for the past month or two, right now you're sitting on a pretty healthy balance and you could trade it all in for some good BTC gains. But now that the block reward has been cut in half and the price didn't double, the result is that mining DOGE is no longer looking so attractive -- especially when you look at other scrypt-based coins.
Right now the difficulty and exchange rate of LTC (2674, 0.0252) means mining LTC will net you about 0.0095 BTC per day, whereas mining DOGE will net you around 0.0105 BC per day. So yes, DOGE is still beating LTC, but only barely. Looking at scrypt coins in general, the top contenders right now for your hashing power are (depending on the time of day) Noblecoin, Lottocoin, Smartcoin, Anoncoin, and Klondikecoin. Others occasionally show up as well at the top of the profitability charts, but looking at the 14-day averages at Coinwarz, I'd recommend sticking with coins that are clearly above LTC during that time span (so 110% or more). Of course, if you're looking to trade for BTC, you shouldn't be mining any of those scrypt coins!
I keep mentioning alternative Proof of Work coins simply because right now, they make the most sense for GPU mining. There's really no other way to put it. The best scrypt-based coins are still profitable, but coins using something other than SHA-256 or vanilla scrypt seem to be the better option. It's not that these coins are inherently better, mind you, but that they're at least different enough to create some buzz, which in turn creates value. And if the buzz fades, so does the value, perhaps with some large coin holders sticking around to prop up the value of their millions of coins. If I were holding millions of DOGE right now, I'd probably be singing a different tune, but I've never viewed DOGE as more than a one-trick-pony and so I've moved on to greener pastures. Maybe I'll be back, but not just yet.
The other interesting thing to happen is that BTC has continued its rollercoaster performance since the start of the downward trend that apparently was sparked buy Russia declaring Bitcoins illegal (or something like that). What's truly awesome is that Russia declared Bitcoins illegal apparently because "it could finance terrorism." Maybe the US and all of the Middle East should do the same? "Ain't nobody gonna finance these here terrorists unless they do it with hard currency, dadgummit!" Anyway, if you're trying to day-trade BTC, the past few days were likely either great or terrible -- depending on whether you managed to properly "buy low, sell high" or if you ended up playing the fool and using the "buy high, sell low" strategy.
I'm bad at predicting where BTC values will go -- or any stock or cryptocurrency for that matter -- so I'm sticking with mining as best as I can! Good luck to you all. I've got a separate post to put together as well as to "what to mine", but before that I want to get into a separate topic. Stay tuned....