I think it's stupid to mine at loss, it's not 2015 again since back then the Value of the minable coin was low but you got lot's of coins and could made a lot of $$$$ in 2017, but now the Diff is the same crazy high and you get very little amount of coins (ETH) that even if the price jumps X5 it means you only got ~ $2 profit per day for 1080TI with Viagra Pill.

How this is better strategy then selling the 1080TI right now? remember that new GPU's are out and by next year with AMD's 7nm GPUS +NV RTX even the 1080TI will be sold at trash prices since no Gamers will pay more(now think about 1060/1070/AMD RX 2nd prices), the GPU performance by next year gonna Double, it's not 2017/18 again.

So it's better to sell the Pascal/Vega/RX GPU's now while they got so warranty left and take the money and maybe buy some coins at current dirty cheap prices or save the money for next year for new GPU's and hopefully GPU mining will be back at big time and we will meet here again with a big smile on our face :-).