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Crypto had a rough November. The pain is persisting into December — and that could signal trouble ahead for the stock market.

Bitcoin has slumped more than 6% in the past 24 hours, sliding from just above $91,000 to roughly $85,600 as of Monday afternoon. The cryptocurrency sold off sharply late Sunday — tumbling more than $4,000 in just a few hours — as December trading kicked off in Asia.

Bitcoin has seen intense swings in recent weeks as risk-off sentiment has spread through markets. In addition to a risk-averse mood, the latest freakout in the crypto world stems from concerns about the unwinding of a…