Bitcoin fell as low as $31,333, a two-week trough, dragging down other cryptocurrencies.
The world’s biggest cryptocurrency has lost more than 20% in the last six days alone and was at half its April peak of almost $65,000.
Data on mining is scarce.
Also on Monday, auction house Sotheby’s announced that a rare pear-shaped diamond that is expected to fetch up to $15 million can be bought at an auction next month using cryptocurrencies.
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