Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 100% |
| 1st Half O/U 0.5 | 100% |
| Inter Miami CF O/U 0.5 | 99% |
| Inter Miami CF 1st Half O/U 0.5 | 99% |
| O/U 1.5 | 94% |
| Inter Miami CF O/U 1.5 | 83% |
| O/U 2.5 | 78% |
| Both Teams to Score | 76% |
| Columbus Crew O/U 0.5 | 71% |
| Inter Miami CF 1st Half O/U 1.5 | 68% |
| 1st Half O/U 1.5 | 63% |
| Columbus Crew 1st Half O/U 0.5 | 63% |
| O/U 3.5 | 52% |
| Both Teams to Score in First Half | 52% |
| Columbus Crew 1st Half O/U 1.5 | 51% |
| Both Teams to Score in Second Half | 51% |
| Inter Miami CF (-1.5) | 50% |
| Inter Miami CF O/U 2.5 | 50% |
| 2nd Half O/U 0.5 | 50% |
| 2nd Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| Inter Miami CF 2nd Half O/U 0.5 | 50% |
| Inter Miami CF 2nd Half O/U 1.5 | 50% |
| Columbus Crew 2nd Half O/U 0.5 | 50% |
| Columbus Crew 2nd Half O/U 1.5 | 50% |
| Columbus Crew O/U 1.5 | 43% |
| Columbus Crew O/U 2.5 | 40% |
| O/U 4.5 | 31% |
| Inter Miami CF (-2.5) | 28% |
| 1st Half O/U 2.5 | 27% |
| O/U 5.5 | 14% |
| Columbus Crew (-1.5) | 2% |
| Columbus Crew (-2.5) | 1% |
Market context
Inter Miami CF and Columbus Crew played an MLS regular-season match on 1 August, with the market set to settle on whether there were additional markets beyond the headline result. The crowd is pricing that at 50% YES, which sits close to a coin flip and is consistent with a fixture that has often been decided by small game-state shifts rather than a single dominant pattern.[1][2]
Recent head-to-head form gives traders a mixed but goal-heavy frame: Inter Miami have won the last two meetings and three of the last five listed by ESPN, including a 5-1 home win in May 2025 and a 3-2 win in October 2024.[1][18] Across broader H2H data, the pair have produced frequent overs and both-teams-to-score outcomes, with AIScore listing over 2.5 goals in 80% of the last five meetings and FotMob noting Miami had not kept a clean sheet in nine matches while both teams had been scoring regularly.[2][3] That makes a mid-range price like 50% less a view on the scoreline itself than on whether the exchange’s “more markets” condition gets triggered by the match environment and product rules.
The main catalysts to watch are team sheets, late injury news, and whether the MLS schedule creates a compressed or rotated XI, because those factors change the likelihood of player props, cards, corners, and in-play derivatives being posted or reached. ESPN listed the match as a regular-season game, while Inter Miami’s own preview page framed it as part of a search for a seventh straight win, underlining that the club was treating it as a high-profile fixture.[1][19] On the crypto side, settlement in USDC means the contract’s cashflows are detached from MLS scoring noise, but broader BTC and ETH volatility can still matter indirectly by affecting on-chain liquidity, exchange balances, and how tightly prediction-market capital is bid around event time.
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.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
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