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I'm pretty sure running the Visa network is a lot more energy efficient today. And you cannot discount the fact that miners will also skim percentages of every

• ipaddr 4y ago
  Visa has a huge footprint and those plastic cards are not organic. The toxic material for printing plus the buildings and employees who drive in to work each day to keep the system going or the millions of miles Visa sales, repair, security, etc drive each year need to be counted. Miners are cheap.. Visa execs flying in private planes are worse for the environment.