Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
37% | 63% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
37% | 63% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ↑ 66,000 | 37% |
| ↓ 62,000 | 31% |
| ↓ 60,000 | 9% |
| ↑ 68,000 | 7% |
| ↓ 58,000 | 3% |
| ↑ 70,000 | 2% |
| ↑ 74,000 | 1% |
| ↑ 72,000 | 1% |
| ↓ 56,000 | 1% |
| ↑ 78,000 | 0% |
| ↑ 76,000 | 0% |
| ↓ 54,000 | 0% |
| ↓ 52,000 | 0% |
| ↓ 50,000 | 0% |
Market context
Bitcoin's price movement during the week of 17–23 August 2026 will depend on macroeconomic data releases, central bank communications, and spot or futures market positioning ahead of the late-summer period. Historical volatility during mid-August has been moderate; the cryptocurrency typically experiences consolidation phases between summer doldrums and autumn institutional rebalancing. The 0% crowd probability suggests traders are either pricing in an extremely narrow price band or treating the outcome as binary—either the asset will move sharply outside any specified range or settle within it with near-certainty.
Comparable precedent from August 2023 and August 2024 shows Bitcoin trading within 8–12% bands during equivalent weeks, with the primary drivers being US inflation data (typically released mid-month), Federal Reserve meeting minutes, and equity market correlation shifts. The current probability assignment warrants scrutiny: if the market has defined a specific price threshold, even modest volatility could breach it, yet the 0% reading suggests either extreme confidence in stability or a threshold set so far from spot price that movement within normal ranges cannot satisfy it.
Traders should monitor the US Consumer Price Index release (typically mid-August), any unexpected geopolitical developments affecting risk appetite, and Bitcoin futures positioning on major exchanges. Regulatory announcements from the SEC or CFTC regarding spot ETF products could also shift sentiment sharply. Settlement occurs 24 August 2026, giving only a narrow window for price discovery after the core week closes.
Methodology
Sports-specific comparison page for What price will Bitcoin hit August 17-23?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- 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%.
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