Wrong. The hashrate has decreased in the past ... if you cared to take a look and can read a plot.
I saw it stagnate at the last reward halving, maybe I did not look far back enough?
It self-regulate. If mining is unprofitable people stop mining, hash rate drop and mining became profitable again. If prices remain at these levels hash rate MUST drop, unless vast majority of hash power is controlled by entities that have no economic interests in mining per se.
So just jumped back into mining, here is a rough breakdown per TH/s: (my electricity costs ($0.08/kWh)
Cost $2.18 per day; income @ $480/BTC = $8.80. (I.e. I am paid to heat my house this winter.)
So one of 3 things are going to happen next.
The price will fall to or below marginal cost of production.
Or
The hashing rate will increase until infrastructure grows to meet marginal cost of production.
Or
A combination of the above.
So no drop in hash predicted, and if the price drops to my marginal cost we may see old hardware from mining farmers go offline, which will be good for decentralization.
About your situation: if the hash rate keep going up then you will have to replace your hardware with a more efficient one in 3 months.
This is quite an addition to the cost of mining, that one must factor in. So, even if you have very cheap energy and very efficient hardware you still can't be on positive cash flow for the next 3 month, let alone recover the initial investment in the hardware. Correct?