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Bitcoin Crosses $70,000 as Polymarket Doubles Odds on Year-End $80,000 Target

8/21/2026

Bitcoin suddenly topped $70,000 overnight, and Polymarket trading pushed the implied probability of $BTC reaching $80,000 by year-end from 30% to 60%, Polymarket data showed.

The repricing of prediction-market odds happened within the same session as the price move.

Polymarket is a prediction market where participants buy and sell event contracts; prices reflect the aggregate of real-money positions, not analyst estimates.

Before the session, the year-end $80,000 bitcoin contract sat at 30%. That 30-percentage-point move, from one-in-three odds to three-in-five, came in a single overnight session.

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