Bitcoin price on August 20?

Platform comparison

Market context

Bitcoin has spent much of August in a choppy range, with recent reports putting spot price around the mid-$60,000s and showing alternating whale accumulation and exchange deposits. That mix matters for a noon ET close because this market resolves only on the Binance 1-minute candle at that specific time, so short-lived liquidity sweeps, ETF-related flows, and funding-driven positioning can matter more than the broader daily trend.

The main historical frame is that BTC has recently respected support in the low-$60,000s while failing to sustain momentum above $65,000–$70,000, which leaves the current 0% YES probability easy to read as a market sceptical of a sharp upside close. On-chain reports from early and mid-August pointed to large wallets adding BTC and, at other times, sending coins to exchanges, a pattern that usually keeps implied volatility contained unless one side of the flow dominates. ETH strength has also been relevant: when ETH outperforms, BTC often lags on a relative basis as capital rotates across the top of the risk complex.

For catalysts, traders should watch spot ETF flow prints, Binance perp funding, and whether whales continue to move coins on or off exchanges. A recent market note flagged US CPI, Jackson Hole on 27 August, and the September FOMC as the key macro calendar items shaping crypto risk appetite into late August, with cooler inflation supporting BTC and hotter prints favouring a retest of support. Stablecoin settlement flows, especially USDC used to fund exchange buying, can still amplify any late move into the noon ET window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

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%.