What price will Bitcoin hit on August 21?

Platform comparison

Market context

Bitcoin's price action on 21 August 2026 will determine settlement of this contract, with traders on Polymarket currently pricing a 12% probability that BTC reaches an unspecified target level on that specific date. The conditional token mechanics mean positions are denominated in USDC on Polygon, allowing traders to exit or hedge throughout the settlement window that closes 22 August 2026 at 04:00 UTC. The current pricing reflects substantial scepticism about a sharp move within a defined 24-hour window, rather than scepticism about Bitcoin's longer-term trajectory.

Historical precedent suggests single-day price targets carry inherent difficulty. Bitcoin has experienced roughly 15–20 days per year with moves exceeding 10% since 2015, but hitting a precise price level within a calendar day requires either volatility clustering or a major catalyst aligned exactly to that window. The 12% implied probability sits below the base rate for extreme daily moves, indicating the market is pricing in either a high target or genuine scarcity of triggering events on that particular date.

Catalysts traders monitor include Federal Reserve policy announcements, spot Bitcoin ETF flows, and geopolitical developments affecting risk appetite. Recent institutional adoption patterns and macroeconomic calendar positioning matter substantially. The settlement date falls outside major regulatory announcement cycles typical for August, which may explain the compressed probability relative to comparable volatility windows in Q1 or Q4 when earnings and policy shifts cluster more densely.

Methodology

We track What price will Bitcoin hit on August 21? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.