Bitcoin suffers worst drop in three months, falling to US$6,840 after South Korea hack

Bitcoin extended losses for a third day, tumbling as much as 12 per cent Sunday as South Korean cryptocurrency exchange Coinrail said there was a “cyber intrusion” in its system.
The largest cryptocurrency declined to US$6,840 as of 4pm in New York, the biggest drop since March 14, according to data compiled from Bitstamp pricing.
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That widens Bitcoin’s losses for the year to 52 per cent. Peer…