Updated Aug 21, 2026
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Bitcoin Crosses $70,000 as Polymarket Doubles Odds on Year-End $80,000 Target

NEW YORK, Aug. 21. 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.

By Yuki Tanaka2 min read$BTC
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Key takeaways

  • Bitcoin topped $70,000 overnight on Aug. 21.
  • Polymarket's implied probability of bitcoin reaching $80,000 by year-end doubled from 30% to 60%.
  • The odds repricing happened within the same overnight session as the price move.
  • The year-end $80,000 contract opened the session at 30% and closed the night at 60%, a 30-percentage-point move.
  • Polymarket prices reflect the aggregate of real-money event-contract positions, not analyst estimates.

NEW YORK, Aug. 21. 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%. It closed the night at 60%. That 30-percentage-point move, from one-in-three odds to three-in-five, came in a single overnight session.

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Frequently asked

How high did Bitcoin rise?

Bitcoin suddenly topped $70,000 overnight.

What did Polymarket's odds show for an $80,000 year-end target?

The implied probability of bitcoin reaching $80,000 by year-end rose from 30% to 60% in a single overnight session.

What is Polymarket?

Polymarket is a prediction market where participants buy and sell event contracts, and its prices reflect the aggregate of real-money positions rather than analyst estimates.

How large was the change in the prediction-market odds?

The odds moved 30 percentage points, from one-in-three to three-in-five, in a single overnight session.

When did this happen?

The price move and odds repricing occurred overnight in New York, reported Aug. 21.