https://www.theguardian.com/technology/2018/jan/11/bitcoin-drops-value-south-korea-trading-ban-cryptocurrencies-tax-gambling >News follows nation’s clampdown on cryptocurrencies as exchanges are raided over alleged tax evasion and fears of gambling addiction >The value of bitcoin plunged 13.5% in the early hours of Thursday after news hit that South Korea is planning to ban cryptocurrency trading.