Bitcoin, the largest cryptocurrency, tumbled as much as 9.8 per cent and was trading at $6,358 as of 11:54 a.m. in London, according to Bloomberg composite pricing.
The Bloomberg Galaxy Crypto Index, a gauge of the largest digital assets, traded near its lowest level since November 2017 as rival coins Ripple, Ether and Litecoin also slipped more than 4 percent each.
Cryptocurrency bulls who bet an expanding user base would drive up prices have faced a string of recent disappointments.
Business Insider reported on Wednesday that Goldman Sachs Group was pulling back on near-term plans to set up a crypto trading desk.