Used GPUs flood the market as Ethereum's price drops below $150
Just took a quick look at this.
If you are located in the 'mining valley' of Washington where power is ~2c/kwh you are still getting healthy profits.A computer with 7 GTX 1070 graphics cards should produce ~230 mh/s and draw 1 kw. This would cost approximately $30/month in power factoring in kw demand + cooling.The above setup will currently generate $385/month in ETH.So basically for miners who are in the right spot with the right facility, this is still profitable. The question is of course for how long. You also need to factor in the cost of equipment, datacenter, employees and difficulty/price.But even if you dont have a facility in washington and just mine from your apartment, your power cost would probably be $100 a month. So its still 'profitable', just not nearly as much as it was in the run up.Cliffnotes: 'professional' miners dont care. Even with the 'crash' today, they are making more per day than they were before the entire run up. For instance the 'worst' time for mining was December 2016 where you would only make $7.50 a day gross in ETH.