Bitcoin above … on August 21?

Platform comparison

Market context

This market settles on Bitcoin's Binance spot price at precisely noon ET on 21 August 2026, using the 1-minute candle close for BTC/USDT. The 100% crowd probability reflects either an extremely high strike price relative to expected Bitcoin valuations two years forward, or minimal liquidity and participation in what amounts to a narrow technical specification. Polymarket traders are pricing near-certainty, which typically signals either consensus around a floor price or sparse order book depth on this particular contract.

Bitcoin's noon-hour volatility on Binance has historically ranged between 0.5% and 2% on ordinary trading days, though this varies sharply with macroeconomic releases and Fed announcements. August 2026 falls outside major regulatory windows or scheduled policy events currently on the calendar, reducing the likelihood of coordinated intraday moves. The 1-minute candle methodology introduces microstructure risk—flash moves, order book imbalances, and regional trading session overlaps can shift closing prints by hundreds of dollars within seconds, even when daily ranges remain modest.

Traders monitoring this contract should track Bitcoin's medium-term trajectory through 2025 and early 2026, as any sustained move below the strike price would compress the probability substantially. Binance's operational status, API reliability, and any changes to BTC/USDT pair specifications warrant attention; the exchange has historically maintained consistent 1-minute candle reporting, but settlement disputes have occasionally arisen from data feed interruptions. The conditional token mechanics on Polygon mean position holders should verify their USDC balances and bridge liquidity well before the August 2026 window closes.

Methodology

We track Bitcoin above … on August 21? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

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.