Bitcoin price on August 21?

Platform comparison

Market context

Bitcoin's noon ET price on 21 August 2026 will settle against Binance's 1-minute candle close for BTC/USDT. The 0% crowd probability reflects either extreme confidence in a specific price bracket or sparse liquidity in this particular settlement window. With over two years until resolution, the market captures long-dated volatility expectations across a period that spans multiple regulatory cycles, institutional adoption phases, and macroeconomic shifts.

Historical Bitcoin price brackets have widened substantially during comparable multi-year windows. In 2020–2022, spot prices ranged from £8,000 to £64,000 across similar timeframes; the 2023–2025 period saw consolidation around £40,000–£70,000 before recent momentum. The current zero probability on this specific date suggests either that traders view the bracket as implausibly narrow or that on-ramp friction—particularly deposit delays via Klarna, SEPA rails, and USDC bridge liquidity—has reduced participation in longer-dated contracts. Binance's book depth for BTC/USDT typically reflects funding flows from retail and institutional sources; sustained low probability often correlates with thin order books on extended settlement dates.

Catalysts through mid-2026 include US monetary policy decisions, potential Bitcoin spot ETF flows, and regulatory clarity from the SEC and FCA. Klarna's payment integration with crypto exchanges and SEPA settlement speeds will influence how quickly capital reaches trading venues, directly affecting intraday volatility on any given noon timestamp. Traders should monitor funding rate cycles and exchange reserve levels as proxies for directional conviction closer to the settlement date.

Methodology

This page compares Bitcoin price on August 21? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

UK Frequently Asked Questions

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

Can UK traders use Klarna to deposit on Polymarket?

Polymarket does not natively accept Klarna. To fund a Polymarket account from the UK, you must first purchase USDC via a crypto exchange (Coinbase UK, Kraken) or Revolut, then transfer to a Polygon-compatible wallet. Some third-party on-ramps (MoonPay, Transak) accept UK debit cards and may support Klarna buy-now-pay-later for crypto purchases.

What payment methods can UK users use for Polymarket?

UK traders typically use: (1) Coinbase UK or Kraken — buy USDC with GBP debit card or bank transfer; (2) Revolut — buy crypto and send to wallet; (3) MoonPay or Transak — Visa/Mastercard UK debit card directly to USDC on Polygon. Standard GBP-to-USDC conversion fees range from 0.5–2.5%.

How long do Polymarket withdrawals take for UK users?

Polymarket withdrawals to your Polygon wallet are instant (on-chain). Converting USDC back to GBP via Coinbase UK or Kraken typically takes 1–3 business days for bank transfer, or near-instant for Revolut. Polygon gas fees are minimal (<$0.01 per transaction).