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Bitcoin falls below $4,000 as crypto collapse worsens

The digital currency lost nearly a third of its value in seven days

Bitcoin just had the week from hell.

The cryptocurrency plunged below $4,000 over the weekend. That means bitcoin has lost nearly a third of its value in seven days, one of its worst weekly selloffs on record. The digital currency has now fallen by about 80% since peaking near $20,000 late last year.

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