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 |
|---|---|
| 33°C | 100% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
The underlying event is the peak temperature recorded at Taipei Songshan Airport on 10 July 2026, a date historically synonymous with extreme heat in Taiwan. Current crowd-implied probability sits at 0% for any temperature range above the lowest bracket, suggesting the market expects a significant cooling anomaly or heavy precipitation to suppress highs. This stance contradicts long-term climatic data, which identifies July as the hottest month at this station, with average highs reaching 92°F (33°C) and frequent peaks exceeding 87°F (30°C) [1]. Historical records from the past decade show that temperatures rarely dip below 28°C during mid-July unless a major typhoon or prolonged monsoon trough intervenes, making the current 0% probability appear statistically fragile against the baseline of typical summer volatility.
Traders must monitor the immediate forecast for typhoon development in the Western Pacific, as a landfall would be the primary catalyst to invalidate the heat expectation and justify the low probability. The 10-day forecast currently indicates a 99% chance of rain and heavy showers for Friday 10 July, with temperatures capped near 87°F due to cloud cover and wind [5]. This precipitation dependency is critical; if the rain system stalls or intensifies, the 0% probability holds, but any rapid clearing could trigger a sharp price correction. Additionally, on-chain mechanics for USDC settlement may see increased whale activity if funding rates on BTC/ETH futures diverge, as macro liquidity often correlates with volatility in weather-linked prediction contracts. Traders should watch the Central Weather Administration for real-time updates on wind direction and pressure, as an eastward shift could signal the typhoon’s approach, directly impacting the settlement outcome [7].
Methodology
This page reads Highest temperature in Taipei on July 10? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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.
- 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.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
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