The secret lives of students who mine cryptocurrency in their dorm rooms

Each time Mark mined enough ether to cover the cost, he bought a new graphics card, trading leftover currency into bitcoin for safekeeping. By March 2017, he was running seven computers, mining ether around the clock from his dorm room. By September his profits totaled one bitcoin—worth roughly $4,500 at the time. Now, four months later, after bitcoin’s wild run and the diversification of his cryptocoin portfolio, Mark estimates he has $20,000 in digital cash. “It just kind of blew up,” he says.