I managed a Bitcoin mining operation a long time ago. We made machines that made 50% of their BTC in the first month of their operation, and the remaining 50% over the next 5 months. After that they cost more to run than they produced.
The accountants wouldn't believe us when we told them that the machines were worthless after only 6 months.
The accountants wouldn't believe us when we told them that the machines were worthless after only 6 months.