Well now is the time to order, isn't it - was going to order but Bitmain's prices are just too high, $480 for the S9k, plus import?  I can get it for the same INCLUDING power supply on eBay from US sellers, so no point really.  6-8 months to ROI even with no power costs?  No thanks.  Difficulty will be 30-50% harder by then too.  There's just no margins left basically.  Maybe a huge facility with almost free power power and that cares enough to spend the $480 to hopefully eek out double that amount over the next three years of running the machine.

If Bitcoin were to double in the year, doesn't even make sense to buy one ASIC... difficulty will only pile on faster.  Even in 2017 when it was all time high, difficult was much lower than it is now.  The demand has been met, it would look like... only thin margins remain.

GPUs are still worth 40% of what they cost, but man, they'll keep dropping too.  Already been a year since the 20xx series were announced.