The question “Should changes be made to the Bitcoin protocol to lower consumption?” is complex. This is because so many factors can influence it. Indeed, the environmental impact of Bitcoin is hard to quantify. Moreover, many of the concerns are exaggerated, based on faulty assumptions and misunderstandings of the protocol’s operation. If you are a Bitcoiner, you most likely feel the same way about the Bitcoin protocol. Exaggerated Power Consumption of The Bitcoin Protocol The power consumption of the Bitcoin protocol is vast. Still, it is comparable to the energy consumption of about a dozen utility-scale nuclear reactors in the U.S., which provides 20 percent of its electricity. While the amount of energy bitcoin uses is small in comparison to large countries, the energy used by this digital currency is a significant source of carbon emissions. Bitcoin users also expend large amounts of energy and computing power to create the “blockchain” of bitcoin transactions. It is impossible to quantify the exact amount of energy used by the Bitcoin protocol. However, its estimated power usage is comparable to other industrialized financial systems. Bitcoin’s energy consumption is not as high as some economists believe. However, the value of its cryptocurrency investment is a good indicator of its environmental impact. Many emerging economies rely on a system that uses excessive power but becomes more efficient over time. More than 1 m...