On a factory floor in Caracas, the din of dozens of computers working non-stop is deafening. This is the sound of a bitcoin mine—one of several in a country where cheap electricity has made crypto mining a rare profitable endeavor.On a factory floor in Caracas, the din of dozens of computers working non-stop is deafening. This is the sound of a bitcoin mine—one of several in a country where cheap electricity has made crypto mining a rare profitable endeavor.