The cryptomine’s operator was likely motivated to maximize cryptocurrency gains by negating the cost of operating the mine. Cryptomines notoriously run off an excess of electricity, with all the world’s cryptomines requiring more energy than the entire country of Australia, the White House reported last year. Where Cohasset is located in the Boston area, “electricity costs have exceeded the national average” by at least 48 percent over the past five years, the US Bureau of Labor Statistics reported.