I am in the retail jewelry business where you have to beg people to buy. Bitmain is in the business where we all want to throw them money and they do not have enough supply. Must be nice 
You have to keep in mind there are huge boom and bust cycles here. So demand is high today because the numbers look good, but it changes fast. They know this is the case so they are making the most of this cycle. But just as fast as it went up it will go down and we will be back to grinding out a few bucks a day per miner.
Not nearly as many people clamoring to sink thousands of dollars on equipment when the ROI is well over a year or more and new equipment shows up making your investment obsolete before you ROI. So we have to keep a clear frame of reference beyond the "now".
