China has re-emerged as the second-biggest bitcoin miner after the US, despite Beijing's ban on crypto activity. A surge in covert operations has made it a major mining hub again, the Cambridge Centre for Alternative Finance found. China's crackdown resulted in a swift drop in global bitcoin mining, which has now recovered to hit all-time highs. Get the inside scoop on what traders are talking about — delivered daily to your inbox. Loading Something is loading. Email address By clicking ‘Sign up’, you agree to receive marketing emails from Insider as well as other partner offers and accept our Terms...