Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Alternative) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
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 | 49% |
| ↑ 74,000 | 22% |
| ↓ 69,000 | 11% |
| ↑ 75,000 | 9% |
| ↓ 68,000 | 4% |
| ↑ 76,000 | 3% |
| ↑ 77,000 | 2% |
| ↓ 67,000 | 2% |
| ↓ 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 macroeconomic conditions, regulatory announcements, and technical levels established over the preceding months. The 2% implied probability on Polymarket reflects extreme scepticism that Bitcoin will reach a specific threshold on that date—though the market description does not specify which price level triggers settlement. Kalshi's binary crypto markets typically enforce tighter settlement criteria and higher KYC requirements than Polymarket, which may explain divergence in how traders price tail-risk events across platforms. Betfair's decimal odds format and Smarkets' commission structure (charged on winnings rather than stakes) create different effective odds presentations, though all four platforms converge on the underlying event: a single day's price observation.
Historical precedent suggests single-day price targets carry structural disadvantage. Bitcoin has experienced multiple five-figure daily swings since 2017, yet predicting *which* day a specific price will be touched remains difficult even with directional conviction. The 2% probability aligns with how prediction markets typically price low-confidence, time-specific outcomes. Traders should monitor Federal Reserve policy signals, spot-ETF inflows (tracked via Bloomberg and CoinShares reports), and geopolitical risk appetite in the months preceding August 2026. Regulatory clarity from the SEC or CFTC could shift volatility expectations materially. The settlement window closing on 21 August at 04:00 UTC means traders must account for timezone-dependent price feeds and exchange-specific closing times when evaluating execution risk.
Methodology
We read What price will Bitcoin hit on August 20? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
FAQ
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Which platform is accessible globally?
- Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
- Which platform supports Klarna/SOFORT?
- Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.
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