Depending on your cost of electricity, mining is not a net profit operation. And, this is by design. At one point an individual with a computer in the the basement could eek out a small profit. As more and more miners entered the fray with faster and faster processors, the algorithm was re-tuned. Now, mining is dominated by huge "farms" in colder areas near power plants.

At this point in time, I'm not interested in accepting cryptocurrency as part of my business because the currency value fluctuates wildly. If I accept a payment of, say 50 units of some currency, I don't know how many burgers this will buy next week -- or even if the currency exchange will be operational.

If you can afford to speculate, cryptocurrency is great.

I don't claim that this is a definitive article, but it discusses a few things.