Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| ↑ 79,000 | 100% |
| ↑ 78,000 | 100% |
| ↑ 77,000 | 100% |
| ↑ 76,000 | 100% |
| ↑ 75,000 | 100% |
| ↑ 80,000 | 44% |
| ↑ 81,000 | 24% |
| ↑ 82,000 | 14% |
| ↓ 74,000 | 14% |
| ↓ 73,000 | 7% |
| ↓ 72,000 | 2% |
| ↓ 71,000 | 1% |
| ↓ 70,000 | 1% |
| ↓ 69,000 | 1% |
| ↓ 68,000 | 1% |
| ↓ 67,000 | 0% |
Market context
Bitcoin's price action on 21 August 2026 will depend on macroeconomic conditions, regulatory developments, and technical levels established in the months preceding that date. The 14% implied probability suggests the crowd views a specific price target as unlikely within a single trading day, reflecting the volatility inherent in crypto markets and the difficulty of pinpointing exact price levels across a 24-hour window.
Historical precedent shows Bitcoin rarely sustains sharp directional moves confined to single calendar days without preceding weeks of accumulation or distribution. During the 2021 bull run, daily moves of 10–15% occurred, but these typically followed established trends rather than emerging in isolation. The current probability weighting aligns with statistical patterns where extreme price targets require either unexpected news catalysts or the culmination of multi-week momentum—both difficult to time precisely. Comparable single-day price targets in crypto markets have historically settled at probabilities between 8–20%, depending on how far the target sits from prevailing spot prices.
Traders should monitor regulatory announcements from the SEC or CFTC, macroeconomic data releases (inflation, employment figures), and institutional adoption news in the weeks before August 2026. Bitcoin's correlation with equity markets and Treasury yields has strengthened since 2023, making broader financial conditions a key dependency. Technical levels established by July 2026 will frame whether the August 21 target lies within a realistic daily range or requires a shock event to materialise. Recent volatility clustering in crypto markets suggests that if conditions favour sharp moves, they typically build over 5–10 trading days rather than appearing without warning.
Methodology
Sports-specific comparison page for What price will Bitcoin hit on August 21?. 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.
FAQ
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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