Bitcoin falls due to advertising ban on Facebook.
Bitcoin fell 11 percent on Thursday to a minimum since the end of November, as a ban on crypto ads on Facebook and the growing reaction of regulatory authorities against the nascent market scared investors.
Thursday's fall to a low of $ 9,022 on the Bitstamp stock exchange in Luxembourg puts the value of the world's largest cryptocurrency at less than half of the $ 20,000 high it reached in December.
Other cryptocurrencies, including Ripple and Bitcoin Cash, also had double-digit percentage declines, according to Coinmarketcap.com, which tracks markets.
The explosive rise in the value of digital currencies last year and the avalanche of new retail investors attracted by the market have shaken global regulators, nervous about a sector largely used for speculation.
This week, Facebook said on its website that it will ban any advertising that "promotes financial products and services that are often associated with deceptive promotional practices, such as binary options, initial offers of currencies and cryptocurrencies." It was not clear if the ban would affect all cryptocurrency ads on the social networking site.