I mine bitcoin with my ASIC and I mine on profit following scrypt pool for bitcoin with my GPUs.
I pay roughly 12p per kWh. I assume
BTC1 is worth £520 for the calculations below.
My ASIC is using 300W so 7.2kWh a day, that's £0.864. It makes
BTC0.016 a day, which is worth £8.32. My net profit in £ is therefore £7.46, or
BTC0.014. In fiat terms it has broken even, but for the same money back when I placed my pre-order I should have bought
BTC instead.
My GPUs are using ~2500W so 60kWh a day, that's £7.20. I make on average
BTC0.06 a day, which is worth £31.2. My net profit in £ is therefore £24, or
BTC0.0461.
My GPUs have broken even long ago, but if I were to have to start paying it back all over again it would take less than 5 months from their brand new cost, which was £3300. These days you can probably pay £2000 the whole lot, which puts the break even time for someone who were to buy it off me today at less than 3 months.
Also, I don't need heating, and my neighbors love me for my warm walls.

The downside is everything you don't keep in the fridge goes off super fast.