Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
1% | 99% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
1% | 99% | 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 |
|---|---|
| Ashley Avignone | 1% |
| Este Haim | 1% |
| Abigail Anderson | 1% |
| Blake Lively | 1% |
| Selena Gomez | 1% |
| Cara Delevingne | 1% |
| Sabrina Carpenter | 1% |
| Gigi Hadid | 0% |
| Brittany Mahomes | 0% |
| Zoë Kravitz | 0% |
Market context
Taylor Swift has reportedly confirmed Selena Gomez and Gigi Hadid as bridesmaids for her upcoming wedding to Travis Kelce, yet the market for any other individual remains at a 1% implied probability. This low valuation reflects the reality that formal bridesmaid roles are scarce, with some insiders suggesting Swift may simply avoid traditional titles and instead host a “bridesmaid dinner” with her closest friends. The settlement window closes in June 2027, and the contract resolves to “No” if the engagement is called off or the wedding does not occur by that date.
Historically, high-profile celebrity weddings often feature tight, pre-existing friend groups rather than expansive rosters. For instance, Swift previously served as a maid of honor to Abigail Anderson, their two-decade friendship making Anderson a likely candidate for a top role, though not necessarily a formal bridesmaid. Comparable cases, such as Kim Kardashian’s wedding, showed that even with massive media attention, the core group remained small, reinforcing the difficulty of predicting additional names beyond the confirmed duo.
Traders should monitor official announcements from Swift’s representatives or credible outlets like The Sun, which first broke the initial bridesmaid news. Key catalysts include scheduled wedding planning events, such as the upcoming “bridesmaid dinner,” or any shifts in the couple’s engagement status. Recent reporting from The Sun confirms that Swift began inviting friends in late 2025 to build her wedding squad, suggesting that any new names will likely emerge through similar insider channels before the public. Watch for whale flows in related crypto prediction markets, as sudden volume spikes often precede major celebrity announcements.
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.
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.
- 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.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- 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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