wow - Bitcoin, the biggest and best-known cryptocu
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The virtual currency is down by close to 25 percent this week and almost 40 percent in 2018.
The second and third largest virtual currencies, Ethereum and Ripple, also plunged more than 20 percent at the session low, Coinmarketcap.com said. Ethereum was last down 18.2 percent, at $913.37, while Ripple last traded at 80 U.S. cents, down 16.7 percent.
Retail investors have poured money into digital coins, enticed by the huge run-up in prices. Regulators say cryptocurrencies are highly speculative and dangerous investments.
On Thursday, India vowed to eradicate the use of crypto-assets, joining China and South Korea in promising to ban parts of the nascent market where prices have boomed in recent years.
Social media website Facebook (FB.O) said this week it would ban cryptocurrency advertisements because many were associated with misleading or deceptive promotional practices. U.S. regulators have sent a subpoena to two of the world’s biggest cryptocurrency players, Bitfinex and Tether