![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fs3.postimg.org%2F7uaxq23fz%2FS4_ROI.jpg&t=591&c=OY_WgylFoTi7Pg)
i've added 24 % import tax, so price went up to 1800$ (it's my import tax in my country),i rated the energy costs at 0.1$ which is still pretty low ( in my country it's at 0.17 $, and a diff increase of only 10 % ( let's be realistic, will be much higher)
results : spend a total of 4.11 BTC and after 279 days you will still be minus 1.61 BTC