Other major cryptocurrencies also weakened markedly.
Bitcoin traded as low as $6,455.91 early on Wednesday Asia time, its lowest level since April. Bitcoin pared some of those losses to trade around $6,581.88 by 3:15 p.m. HK/SIN, according to CoinDesk.
Bitcoin had fallen around 10 percent over the weekend following news that South Korean exchange Coinrail had been hacked, with a number of lesser-known cryptocurrencies such as Pundi X counting among those affected. Bitcoin, however, was not mentioned by the exchange in its statements, according to Google translate.