NO
I used the mining calculator at BitcoinWisdom.
If you start mining today with 1.2 GH, the model shows that you will earn 0.9527 bitcoin up to 12/31/14. At that point, electricity costs will be greater than the mining yield and your ROI will become negative. At today's exchange rate, 0.9527 bitcoin is $486.9. Personally, if I was faced with those numbers, I'd try to sell it quickly on Ebay, and perhaps lessen the loss somewhat. It sucks to pick the losing horse, but it happens to all of us
Date Difficulty Revenue Profit Return
2014 0
8-28 – 8-31 (4 days) 23844 M 0.08629 0.08456 0.08456
9-1 – 9-30 (34 days) 23844 M 0.4514 0.4424 0.5269
10-1 – 10-31 (65 days) 41203 M 0.2648 0.2595 0.7864
11-1 – 11-30 (95 days) 59333 M 0.1272 0.1247 0.9111
12-1 – 12-31 (126 days) 102 G 0.04242 0.04157 0.9527
2015
1-1 – 1-31 (157 days) 147 G -0.0127 -0.01244 0.9403