Bitcoin set for worst week since 2013 as crypto sell-off intensifies

Cryptocurrencies plunged on Friday, with several of the largest falling by more than 20 percent and bitcoin sliding below $8,000 and headed for its worst week since 2013, as worries about a regulatory clampdown globally sent investors scrambling to sell.The slump in prices this week means the total market value of cryptocurrencies is down to $385 billion, less than half the high it reached in January, according to industry tracker Coinmarketcap.com.The market value of cryptocurrencies is calcula