Very interesting point that the mining profitability issue might keep the price afloat. Many of these companies have a stockpile of BTC and cash so it would not be improbable that they would help bolster the price.
This even opens the door for larger mining companies to put smaller ones out of business in a similar way that bigger oil companies tried to run smaller US businesses into the ground. Dumping their oil reserves at an already vulnerable time they were able to keep barrels of oil under the profit parity. By keeping the price suppressed large miners can play a game of chicken with their competition and knock them out of the mining game.
Good point! Thanks for bringing it up man