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 |
|---|---|
| ↑ 80 | 100% |
| ↑ 90 | 55% |
| ↓ 80 | 53% |
| ↑ 100 | 17% |
| ↓ 70 | 7% |
| ↑ 110 | 3% |
| ↑ 120 | 2% |
| ↓ 60 | 2% |
| ↑ 150 | 1% |
| ↑ 140 | 1% |
| ↑ 130 | 1% |
| ↓ 30 | 1% |
| ↑ 160 | 0% |
| ↓ 50 | 0% |
| ↓ 40 | 0% |
| ↓ 20 | 0% |
| ↓ 10 | 0% |
Market context
Solana's price trajectory through August 2025 will depend on whether SOL sustains levels established in the preceding months, given the token's historical volatility and correlation with Bitcoin and Ethereum movements. The 0% crowd probability suggests traders are pricing in either extreme price ranges outside typical August trading bands or significant uncertainty about settlement mechanics. SOL has traded between $140 and $250 in recent cycles, with on-chain metrics from Solana Beach showing funding rates and whale accumulation patterns as leading indicators of directional conviction.
Historical precedent matters here: Solana's August 2024 performance tracked closely with Bitcoin's summer consolidation, whilst August 2023 saw sharper volatility tied to broader crypto sentiment shifts. The current probability distribution reflects either a market view that August price action will fall outside anticipated ranges or genuine disagreement on what constitutes a "hit" for settlement purposes. USDC-denominated spot prices on major exchanges including Coinbase and Binance will determine settlement, making exchange-level liquidity and order book depth material factors.
Traders should monitor Solana Foundation announcements regarding network upgrades, validator economics changes, or ecosystem funding initiatives, as these have historically moved SOL in advance of implementation. Macro Bitcoin and Ethereum price action in July will likely anchor August expectations; funding rates on perpetual exchanges currently signal moderate leverage positioning. Any significant shift in staking yields or validator returns could alter on-chain holder behaviour ahead of August, whilst broader risk-off sentiment in equities markets typically compresses crypto volatility across the board.
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.
- 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.
- 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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