Cryptocurrencies dropped as Bitcoin gave up the $4,000 level it’s hovered around since the start of the year.
The largest digital currency slumped as much as 6.2 percent in the European morning, erasing an earlier small gain to trade at $3,785.17 at 9:28 am in London. The Bloomberg Galaxy Crypto Index, a gauge of the largest cryptocurrencies, fell 7.7 percent as Bitcoin’s rival tokens, including Ether, Litecoin and XRP, also retreated.
Timothy Tam, co-founder and CEO of CoinFi, a cryptocurrency research firm in Hong Kong, said while there wasn’t an immediate reason for the abrupt sell-off, he did notice a large transfer of about 40,000 Ether into an exchange an hour before the drop.
“Usually transfer of Ethereum onto an exchange indicates an intent to sell, and if there is a sell-off on one exchange it compounds like dominoes to another because arbitragers will sell immediately on the other exchanges as well,” he said in a message.
The cryptocurrency industry took another blow earlier this week after Ethereum Classic, an offshoot of the second-largest digital currency, came under a so-called 51 percent attack, in which some computers supporting a network falsify transactions. Coinbase Inc, one of the world’s largest crypto exchanges, said it had found “deep reorganisations” of the Ethereum Classic blockchain. Some $1.1 million in the coins may have been spent twice.
Cryptocurrency prices plu-mmeted in 2018 amid ong-oing security concerns and regulatory scrutiny.