Bitcoin above … on August 21?

Platform comparison

Market context

The market centres on Bitcoin's Binance spot price at precisely noon Eastern Time on 21 August 2026, using the 1-minute candle close on BTC/USDT. The 100% implied probability reflects either an exceptionally high strike price relative to expected spot levels, or minimal liquidity and trader participation at the time of assessment. Resolution hinges entirely on Binance's recorded closing price for that specific minute—not other exchanges, not other trading pairs, and not any price sampled outside the noon ET window.

Bitcoin's intraday volatility at fixed timestamps has historically proven difficult to predict with certainty. A 1-minute candle close is susceptible to localised order-book dynamics, flash movements, and thin liquidity conditions that can diverge sharply from broader market sentiment. Comparable fixed-time Bitcoin contracts on prediction markets have shown that even when directional conviction is high, the precision required to hit specific price levels within a single-minute window introduces material execution risk. The 100% probability here suggests either the strike is set far below consensus expectations, or the market lacks sufficient depth to reflect genuine uncertainty.

Between now and August 2026, macroeconomic policy shifts, regulatory announcements affecting spot trading volumes, and Binance platform changes could alter intraday price behaviour. Traders should monitor whether the strike price remains realistic relative to Bitcoin's trading range as the settlement date approaches. Binance's operational status and any changes to its candle-reporting methodology would directly affect resolution mechanics.

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

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

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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.