Bitcoin was first mined in 2009 on a standard laptop CPU. Within a few years, miners had migrated to graphics processing units for their superior hashing efficiency, then to field-programmable gate arrays, and by 2013 to application-specific integrated circuits purpose-built for Bitcoin mining. Each hardware generation rendered the previous one unprofitable, because the proof-of-work mechanism adjusts difficulty to maintain a ten-minute block interval regardless of total network computing power. Better hardware does not reduce the network’s energy consumption; it raises the difficulty floor, and the total energy expenditure grows with investment.

The United States Energy Information Administration estimated in 2024 that domestic cryptocurrency mining consumed somewhere between 25 and 91 terawatt-hours of electricity in 2023, representing between 0.6% and 2.3% of total U.S. electricity demand for the year. That range is wide because the industry has resisted disclosure, but even the low end places cryptomining on par with entire industrial sectors that receive far more regulatory attention.

The EIA identified 137 cryptocurrency mining facilities operating in the United States as of 2023, concentrated in Texas, Georgia, and New York. For the 101 facilities where maximum capacity data were available, combined peak power demand reached 10.275 gigawatts — roughly 2.3% of total average U.S. annual power demand. Applying an 80% utilization rate to that figure yields an estimate of 70 terawatt-hours per year, sitting comfortably within the top-down projection derived from global hashrate data.