The only way I would opt in for mining if I would have free or nearly free electricity. In all other cases, I would just stay out of it!
I have 17 cent per kwatt in the summer ---------- So I don't mine except a few usb sticks for fun
I have 10 cent per kwatt power on OCT 1 ---------- So I buy the newest most efficient gear just in time for Oct this year I got 3 s-7's
I will mine them until early April and then I have to sell them Because May 1st power rises to 17 cents.
Been doing this for a few years and it has worked out okay.