Just want to put this out there. What is the problem with crypto mining and energy consumption? Yes, I know you'll raise environment concerns, I get it.
However, consider this: a civilisation is measured by its energy consumption. Before we discovered fire and used any stone tools, the only energy we had was whatever our bodies produced. Then we discovered fire, made tools, invented the wheel, etc. Until now, when we use computers, robots and other machines to help us live. Our life expectancy and quality of life has increased dramatically.
Shouldn't we concentrate our efforts on using clean renewable energy, rather than restrict our use of it?
Frankly, if there is a problem with too much energy consumption, we should go back and live in caves, and hunt in groups.
Nobody says that we need to give up the benefits of civilization. However, along with technical development, we need to be very careful about the environment, and with this, humanity has recently had big problems and therefore the climate began to change dramatically. Here you really need to choose: either mindlessly continue to consume the energy of coal, gas and oil, or switch to other sources of it, especially since the technology of extracting energy from the sun, wind and water has made great progress in recent years. In my opinion, solar panels and wind generators are exactly what we need now.
Cryptocurrency for mining now also needs to switch to the use of renewable energy sources, otherwise states may even try to ban it because of this. There is no need to give states an extra reason for this. It is important here that bitcoin shows an example in this.