Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket UK Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Polymarket UK → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Polymarket UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Polymarket UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Polymarket UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Polymarket UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Polymarket UK.
Active sub-markets
Market context
Bitcoin's price action on 28 May 2026 will be determined by spot market trading across major exchanges—Coinbase, Kraken, Bitstamp and others—with settlement likely referencing the closing price or a time-weighted average. On Polymarket, this contract currently shows 0% implied probability, suggesting traders either expect the price target to be unreachable or view the market as too illiquid to price meaningfully at this distance. The settlement window closes 29 May at 04:00 UTC, giving a narrow window for price discovery. Traders holding conditional tokens on Polygon will need to monitor USDC liquidity and bridge mechanics as the settlement date approaches, since redemption depends on oracle confirmation of the final Bitcoin price.
Historical precedent offers limited guidance here: Bitcoin's intraday and daily volatility has ranged from 5–15% in calm periods, but catalyst-driven moves of 20–30% occur regularly. The 0% reading reflects either extreme scepticism about a specific price level or genuine uncertainty about which oracle source Polymarket will use for settlement—Coinbase, CoinMarketCap, or another feed. Comparable long-dated crypto price markets on Polymarket have typically seen probability mass concentrate only as settlement approaches, when volatility expectations crystallise.
Key catalysts through May 2026 include US monetary policy announcements, spot Bitcoin ETF flows, and any regulatory shifts in major jurisdictions. Recent Bitcoin spot ETF approvals in January 2024 demonstrated how institutional adoption can shift price floors, though 2026 dynamics remain speculative. Traders should track Federal Reserve guidance and any significant cryptocurrency legislation, as these have historically driven multi-week Bitcoin trends that could anchor price expectations by late May.
Methodology
We track What price will Bitcoin hit on May 28? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
FAQ
- Is this market available outside the US?
- Polymarket UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket UK triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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