Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| ↑ 72,000 | 100% |
| ↑ 71,000 | 100% |
| ↑ 70,000 | 100% |
| ↑ 73,000 | 56% |
| ↑ 74,000 | 26% |
| ↑ 75,000 | 14% |
| ↓ 69,000 | 6% |
| ↑ 76,000 | 5% |
| ↓ 68,000 | 3% |
| ↓ 67,000 | 2% |
| ↑ 77,000 | 1% |
| ↓ 66,000 | 1% |
| ↓ 65,000 | 0% |
| ↓ 64,000 | 0% |
| ↓ 63,000 | 0% |
| ↓ 62,000 | 0% |
Market context
Bitcoin's price action on 20 August 2026 will be determined by spot and futures markets across global exchanges. The crowd has priced this outcome at 2% implied probability, suggesting either a specific price target that sits well outside consensus expectations or a settlement mechanism that requires unusual precision. Without the explicit price level stated in the market title, traders are effectively betting on volatility clustering or a discrete event that moves Bitcoin sharply on that particular date.
Historical precedent shows Bitcoin has touched new price milestones on roughly 5–8% of trading days over any given year, though the distribution is heavily skewed toward bull-market phases and cluster around major announcements. The 2% probability here sits below baseline frequency, implying the market views August 2026 as a relatively ordinary trading window absent extraordinary catalyst. This discount may reflect either consensus around a narrow price band or genuine uncertainty about whether the settlement price will be verifiable with sufficient precision.
Traders monitoring this outcome should track macroeconomic calendars for August 2026, including US inflation data and Federal Reserve communications, which have historically moved Bitcoin alongside risk assets. Regulatory announcements—particularly from the SEC regarding spot Bitcoin ETF approvals or custody frameworks—remain material. Bitcoin's correlation with equity indices and Treasury yields will likely dominate daily moves unless a discrete geopolitical or monetary shock materialises. The settlement window closes 21 August, leaving minimal margin for post-market corrections.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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.
- 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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