It looks like I can collocate it in a data center in my city for not too much. It should pay for its months rent there in just a couple days of each month.
At the rate it is earning I should break even in about 11 weeks even after paying the data center.
It was only 8.4 bitcoins, not 10 and I have 1/4 bitcoin back already after just a couple of days.
How did you calculate that?
The estimate earning in the whole April for 1 Th is 2 BTC. How did you made 2 BTC in a "couple" of days in March? How did you get the 11 weeks ROI?
From cex.io for 1Th at 50% increase/month:
BTC
Apr-14 7510 373 2.02
May-14 11265 560 1.34
Jun-14 16898 840 0.90
Jul-14 25347 1260 0.60
Aug-14 38021 1890 0.40
Sep-14 57031 2835 0.27
At 25% diff increase you should ROI by September. But at 50%...winter is coming.