For years, critics with a limited understanding of cryptocurrency, have been seizing on a point that they think they understand: power consumption. Or, at least, they think they understand that. They understand that global warming is related to energy consumption, and they fear that cryptocurrency is causing it. This blog post looks at the criticisms levelled by journalists and others about the energy use of cryptocurrencies. It begins by examining the critics arguments and concludes by explaining that energy use of cryptocurrency is not particularly different from other energy uses. What's particularly interesting is to look at the benefits to people who do not hold or use cryptocurrency, who benefit from its existence even without using it.