Bitcoin had a rough weekend.
Coming off a week of heavy losses, bitcoin fell as much as 10 percent and set a fresh low at $3,447.58 on Sunday, according to data from CoinDesk. That was the cryptocurrency's lowest level since September 2017. It later recovered to roughly $3,945 as of 6 p.m. ET.
Over seven days, bitcoin has now lost more than 35 percent of its value, according to CoinDesk. This marks its biggest one-week drop since April 2013, when the cryptocurrency fell more than 44 percent, according to CoinDesk.