Bitcoin fell sharply alongside other assets on Friday, hitting a six-week low and officially entering bear market territory. Bitcoin sank 7% in the last 24 hours to $54,561, according to Coin Metrics data, its lowest level since Oct. 8. The cryptocurrency is down 20% from an all-time high of nearly $69,000 which it hit earlier this month. Bear markets are typically defined by a 20% decline or more from recent highs.Other cryptocurrencies also plunged Friday. Ether, the second-biggest crypto, fell more than 10% to $4,007, while XRP slumped 10% to around 95 cents. Digital currencies are falling in tandem with other ... (full story)