Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Who Will Win Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Who Will Win → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Who Will Win → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Who Will Win → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Who Will Win → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Who Will Win → |
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 Who Will Win.
Active sub-markets
Market context
Bitcoin's price action on 31 May 2025 will settle this market, with the crowd currently assigning zero probability to a YES outcome. The settlement window extends into June, allowing for price confirmation across the final trading hours of May and into the following day. This timing sits within a volatile period for cryptocurrency markets, where intraday swings and month-end positioning often create sharp moves.
Historical precedent suggests that month-end Bitcoin price targets attract minimal backing when framed as binary outcomes. Spot prices rarely hold at exact thresholds; instead, traders and institutions manage positions around psychological levels and technical resistance. The 0% probability reflects either an extremely high strike price relative to current spot, or market consensus that the specified level is unrealistic given typical volatility bands. Bitcoin's May performance has historically been mixed—2021 saw a sharp correction mid-month, whilst 2024 delivered sustained strength into June. Without knowing the exact strike price, the zero reading indicates the crowd views the target as an outlier rather than a plausible outcome.
Catalysts shaping May's trajectory include Federal Reserve communications on interest rates, institutional Bitcoin holdings announcements, and any regulatory shifts from the SEC or international bodies. Spot exchange volumes typically spike in the final week of May as fund managers rebalance quarterly positions. Geopolitical developments affecting risk appetite and macroeconomic data releases will influence broader cryptocurrency sentiment. Traders monitoring on-chain metrics—particularly exchange inflows and whale accumulation patterns—may identify value if volatility widens unexpectedly during the settlement window.
Methodology
This page reviews What price will Bitcoin hit on May 31? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Who Will Win — the application we operate, where you trade directly against the Polymarket order book at 0% fees.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
FAQ
- Where can I trade this market with the lowest fees?
- On Who Will Win, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, Who Will Win 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.
Trade What price will Bitcoin hit on May 31? on Who Will Win
Live order book, 0% fees, USDC settlement in seconds.
Trade on Who Will Win →