1.The difficulty is starting to have huge increases again while the price is going DOWN, it already is below 300 !
2.My estimate is that next difficulty is going to be above 15 % and the others following will be somewhere around same level !
3.Soon NEXT GENERATION ASICS will be launched and the difficulty will start raising even more, we might see 30-40 % + increases in difficulty,
and the miners we bought now will be absolute, with no chance to EVER ROI.
With all these, let's just ask ourselves:
Is it still worth mining bitcoin right now ?
It all depends how much you pay for GHS and the maintenance costs. The next difficulty is only slightly rising and who knows how much the next difficulty will be. It will likely raise again slightly.
I think you are likely to ROI if you buy GHS now at less than 0.0015 with low maintenance costs.