Bitcoin price on June 21?

Platform comparison

Active sub-markets

Market context

Bitcoin’s noon ET Binance close on 21 June will settle this market, so the key question is whether BTC finishes the day inside the relevant bracket at that exact 1-minute candle. With the live spot price around the mid-$60,000s on Binance, the market is already being priced near the lower-middle outcome bands rather than the extremes, which is consistent with the 0% YES crowd view only if traders are treating the current quote as stale or expecting a sharp intraday move before the settlement cut-off.[10][2]

For comparison, Polymarket’s same-date bracket market has shown the front outcome around 64,000-66,000, with 62,000-64,000 close behind, while its up/down version also places a majority on Bitcoin finishing higher over the day.[2][1] That matters when reading venue differences: Polymarket quotes probability directly, whereas Kalshi-style and Betfair/Smarkets-style venues usually express the same view through contract prices or decimal odds, with the effective cost also shaped by commissions, spreads, and minimum trade sizes. On this kind of BTC close market, those frictions can make a one-bracket difference in implied probability more meaningful than the headline number alone.

The main catalysts are macro and crypto-specific rather than exchange-specific: U.S. rate expectations, ETF flow data, and any abrupt BTC volatility between now and noon ET can move the final Binance candle enough to change the settlement bracket. Binance itself publishes the reference close, so traders should watch the exchange’s spot liquidity and any outage or spread widening around the midday window, because the market resolves on that exact 1-minute close rather than an average price.[10][6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Bitcoin price on June 21? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Kalshi Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.