Bitcoin and Ether ended in the red on Thursday, but Ether has surged more than 100% since mid-June.
Yu Chun Christopher Wong | S3studio | Getty Images
Bitcoin Friday fell to its lowest level in more than three weeks, plunging below $22,000 amid a sudden crypto selloff in early European trading.
Bitcoin briefly dipped from $22,738 to below $21,500 as of 2:30 a.m. ET, according to data from CoinDesk, before recovering slightly to just below $22,000 in the 10-minute span.
It comes shortly after the largest digital coin in the world broke above the $25,000 level for the first time since June following a rise in US equities.
Ether rose from $1,808 to $1,728 at the same time before recording a muted bounce. As of 3:05 a.m. ET, it stood at $1,733, a level it has not traded at since Aug. 10.