I don't think the profitability now will last long , it will decrease again until it reaches the what i call mining support point which is $1/card seems like the avarege electricity prices worldwide keep this support point from getting lower , the only thing that can break this $1/card/day is newer hardware getting out to the market...
That is right. A few weeks ago, the mining profit was less than $1/card.
Mining gain is always volatile, as the whole crypto currencies are.
It's impossible to do a precise forecast, the only think we can say for sure is that there always was a coin to mine and hopefully this trend will continue.