Great discussion going on here, interesting to read.
Bitcoin mining is in a huge bubble right now. It's hard to get data to analyze that market, but how many $$$ have been injected in that market since 2012? Consider all the R&D, investments in mining business, and investments in ASIC manufacturers. I'm pretty sure the money injected in mining overshoot what the Bitcoin economy is able to support today.
Bitcoin mining can't go over what the Bitcoin economy is able to support. The better the Bitcoin economy is, the better it's network is going to be. Like any bubble, it usually ends with a crash. I think mining was temporarily saved by the Bitcoin bubble last November, but it can't grow like that eternally, not at that rate.
I'm pretty sure it's going to crash hard in the following months. The market has to correct itself, the sooner the better.