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 ?