Bitcoin above … on August 17?

Platform comparison

Market context

This market resolves based on Bitcoin's closing price on the Binance BTC/USDT spot pair at noon Eastern Time on 17 August 2026, using the 1-minute candle data. The settlement window extends to 16:00 UTC that same day, allowing a four-hour buffer for price confirmation and data retrieval from Binance's official candles feed. The specific threshold price is embedded in the market title and will determine whether the noon close exceeds that level.

The 100% implied probability reflects either an exceptionally high price threshold or market consensus that Bitcoin will trade substantially above the specified level by mid-August 2026. Historical precedent suggests that single-point-in-time Bitcoin price predictions at major exchanges tend to compress toward certainty only when the threshold sits well below prevailing spot rates. Funding rates on perpetual futures and spot-futures basis spreads on Binance will indicate whether traders expect volatility or directional conviction near the settlement date. On-chain metrics including exchange inflows and whale accumulation patterns in the weeks preceding mid-August could shift conviction if large holders begin repositioning ahead of that window.

Traders should monitor macroeconomic calendar events in early August 2026—particularly US employment data and Federal Reserve communications—as these historically drive Bitcoin volatility across all timeframes. Regulatory announcements affecting spot trading or stablecoin settlement mechanisms could also influence Binance's liquidity and pricing at noon ET. The specificity of the 1-minute candle close means that flash movements or order book imbalances in the final seconds before 12:00 ET will determine settlement, making real-time exchange monitoring essential for positions held through the resolution window.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

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

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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%.