So what if you pay .05usd/kwh? Like me.
I pay US$0.06/Kwh "off peak" and all it does is move the "drop dead" date about two weeks.
This all depends on the Difficulty Factor and value of each BTC - BOTH of these numbers are very "volatile" just now and I don't see that changing for several months.
Once the crooks latch on to a way to make money it is VERY hard to kill them off - just like the small rodent type of rat.
The Difficulty Factor almost exactly follows the computing horsepower, which is growing at 4%/day. It has been like this for the last year or so, so it isn't volitile at all. It is very predictable, at least until people stop adding to the network, which no one knows when.
Price per BTC doesn't matter, because if it goes up, you would be better off buying bitcoins directly. If it goes down, you would be better of not doing anything