Bitcoin price on August 21?

Platform comparison

Market context

Bitcoin's spot price at noon ET on 21 August 2026 will determine this market's resolution, with settlement tied to the Binance BTC/USDT 1-minute candle close at that specific timestamp. The 0% crowd probability reflects the market's current inability to forecast price action nearly two years forward with sufficient confidence to back any particular bracket. Historical volatility in Bitcoin's intraday ranges—typically 2–5% on routine trading days, though wider during macro events—means the noon snapshot could fall across multiple price brackets depending on broader market conditions at that moment.

Comparable long-dated Bitcoin price markets have shown that crowd forecasts tend to cluster around recent price levels or round numbers, with probability mass shifting only when material on-chain or macroeconomic catalysts emerge. The absence of near-term conviction here is unsurprising given the settlement window extends beyond typical institutional planning horizons. Traders monitoring this contract should track developments in US monetary policy, spot Bitcoin ETF flows, and regulatory announcements—all of which have historically moved intraday volatility and directional bias. Funding rates on perpetual futures and whale accumulation patterns visible on Glassnode or similar on-chain analytics platforms can signal positioning ahead of major dates, though noon ET liquidity on Binance spot markets typically remains robust regardless of broader sentiment.

Methodology

This page reads Bitcoin price on August 21? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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%.