(CNBC) -- Bitcoin had a rough weekend.
Coming off a week of heavy losses, bitcoin fell 10 percent and set a fresh low at $3,447.58 on Sunday, according to data from CoinDesk. This is the cryptocurrency's lowest level since September 2017.
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.
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