Bitcoin price on August 21?

Platform comparison

Market context

Bitcoin's price action over the past 48 hours has remained within established ranges, with spot trading on Binance showing typical intraday volatility around the $60,000–$65,000 band. The noon ET timestamp specified in this market creates a narrow resolution window—a single one-minute candle on 21 August 2026—meaning the outcome depends entirely on where BTC/USDT settles during that precise 60-second interval rather than broader daily movements.

Historical precedent suggests that single-candle price targets at fixed times carry execution risk that standard daily close markets do not. Bitcoin's intraday volatility often exceeds 2–3% within minutes, particularly around US market open and during Asian session transitions. Previous markets resolving on specific hourly candles have shown that liquidity patterns and order book depth at noon ET can differ materially from 24-hour volume-weighted averages, making pinpoint predictions difficult. The current 0% crowd probability reflects this structural difficulty—traders are pricing in substantial uncertainty around whether any given bracket will be hit at that exact moment.

Catalysts between now and August 2026 remain diffuse, though Federal Reserve policy signals and macroeconomic data releases will shape broader Bitcoin sentiment. Binance's API reliability and any potential platform maintenance windows on that date could theoretically affect price reporting, though such disruptions are rare. Traders monitoring this market should track whether Bitcoin establishes a sustained directional bias in coming weeks, as mean-reversion patterns often dominate single-candle outcomes when spot prices lack clear momentum.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

UK Frequently Asked Questions

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.