Thank you for the recommendation about PAX-Gold.

I comment that in the ecological aspects, the mining of BTC has been criticized for the high consumption of energy and the need for cooling systems, but I have seen projects that use renewable and clean energy that have left me with a good impression, I think there is an operational one in China and another one that was in project in Paraguay (South America), I don't know if there was one of solar energy in the USA and something of a hydroelectric project in Canada ... of these last two I don't remember well.