Bitcoin Up or Down on May 31?

Platform comparison

Market context

Bitcoin's intraday performance on 31 May 2026 will be measured against its noon ET price on 30 May, with resolution depending on whether the 12:00 ET candle close on the final day moves higher or lower than the previous day's equivalent timestamp. The 0% probability assigned to an upward move suggests market participants are pricing in either a decline or flat consolidation across this single-day window, though the specificity of noon-to-noon comparison introduces volatility risk that single-day directional bets often carry.

Historical precedent for one-day Bitcoin moves shows that intraday reversals of 2–4% occur regularly regardless of broader trend direction. May typically sees moderate volatility in crypto markets as institutional positioning adjusts ahead of month-end settlements and quarterly rebalancing. The extreme skew toward "Down" here may reflect recent price action or technical resistance near the May 30 level, but single-candle comparisons are inherently sensitive to timing—a move that occurs at 11:55 ET versus 12:05 ET can materially shift outcomes.

Traders should monitor US economic data releases scheduled for late May, any Federal Reserve communications affecting risk appetite, and Bitcoin's behaviour relative to traditional equity futures during the 12:00 ET window, when US market open volatility often influences crypto. Binance's own operational status and any network events would directly affect candle data integrity. The settlement window closes at 16:00 ET on 31 May, leaving a four-hour window for final price discovery after the noon candle closes.

Methodology

We track Bitcoin Up or Down on May 31? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

Is this market available outside the US?

Prediction Today 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 does it cost to trade on Prediction Today?

Zero. Prediction Today routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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, Prediction Today triggers a quick verification flow that finishes in minutes.