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 |
|---|---|
| ↑ 65,000 | 100% |
| ↑ 66,000 | 16% |
| ↓ 64,000 | 14% |
| ↑ 67,000 | 3% |
| ↑ 68,000 | 1% |
| ↓ 63,000 | 1% |
| ↑ 72,000 | 0% |
| ↑ 71,000 | 0% |
| ↑ 70,000 | 0% |
| ↑ 69,000 | 0% |
| ↓ 62,000 | 0% |
| ↓ 61,000 | 0% |
| ↓ 60,000 | 0% |
| ↓ 59,000 | 0% |
| ↓ 58,000 | 0% |
| ↓ 57,000 | 0% |
Market context
Bitcoin’s August 10 print will be decided by whether spot BTC can hold above the nearest high-volume bands into the settlement window, with the market currently pricing an outcome far below the mid-2026 models that cluster around the mid-$60,000s. CoinCodex’s 10 August forecast is $65,614, Changelly’s is $65,219.96, and CoinCheckup’s is $65,839, which broadly frames the area most prediction-style forecasters see as the base case rather than an extreme move.[1][2][8] On Polymarket, the leading band is 64,000–66,000 at 88%, with 66,000–68,000 at 9%, showing how heavily the crowd is anchored to a relatively tight range.[6]
That framing is consistent with Bitcoin’s tendency to resolve around local liquidity pockets unless a fresh catalyst drives a breakout in funding and open interest. The key read-through for this contract is whether BTC spot can keep absorbing offers without a sharp shift in perpetual funding, because a sustained positive funding skew can amplify squeezes while weak funding and thin whale participation usually leave price pinned near obvious round-number strikes. Crypto.news’ short-term model has BTC around $66,534.80, while its broader 2026 range still allows for much wider tails, underscoring that the immediate market question is not long-term direction but whether today’s tape can extend beyond the dominant 64,000–66,000 concentration.[3]
For catalysts, traders should watch exchange spot flows, funding rates, and any large stablecoin or whale transfers that can alter intraday liquidity, especially if they hit around the settlement window. Macro still matters because BTC and ETH often trade as linked risk assets when US rates expectations shift, and the August CPI print later this week is the main scheduled US macro event that could change positioning. Reuters has recently highlighted that Bitcoin has been trading with broad support from institutional flows while still reacting sharply to macro data and ETF-related flow changes, so any renewed bid or distribution into the close could matter more than headline forecasts.[12]
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.
UK Frequently Asked Questions
- 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.
- 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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