China has once again banned cryptocurrencies. It's not even the first time this month Beijing's done so, let alone the first time ever, yet word of the reiterated crackdown sent coin prices tumbling, which may have been the ultimate goal. Bitcoin fell by 5.5 per cent, Ethererum by 7.4 per cent, and Dogecoin by 14.9 per cent, for instance, after this latest announcement and have since rebounded somewhat. "Virtual currency-related business activities are illegal financial activities," the People's Bank of China translated stated today, reiterating what it earlier asserted on September 15. "Carrying out legal currency and virtual currency exchange...