https://www.reuters.com/article/us-crypto-currency-china-mining/chinas-crypto-crackdown-speeds-shift-to-central-asia-north-america-mining-idUSKCN2D71C8 >A crackdown by Beijing is rapidly accelerating a shift in focus by makers of machines that 'mine' cryptocurrencies like bitcoin from China to North America and Central Asia as Chinese clients face an uncertain future.