What price will Bitcoin hit August 17-23?

Platform comparison

Market context

Bitcoin's price action during the week of 17–23 August 2026 will be shaped by macroeconomic data releases, central bank communications, and spot or futures positioning ahead of the late-summer rebalancing period. The 0% crowd probability across most platforms reflects either extreme confidence in a narrow price band or sparse liquidity in a market settling nearly two years forward. Polymarket's decimal odds display and Kalshi's binary structure handle this differently: Kalshi's yes/no framework forces traders into discrete outcomes, whilst Betfair's lay functionality allows backers to express doubt through opposing positions. Smarkets' commission-based model (versus Polymarket's 2% taker fee) becomes material on low-probability events where position sizing matters.

Historical Bitcoin volatility in August has ranged from 8% to 15% weekly moves, though the 2026 timeframe sits beyond most institutional hedging windows. The current 0% reading suggests either the market has collapsed to a single price expectation or that the settlement criteria—likely tied to a specific exchange close or aggregated benchmark—are perceived as extremely tight. Traders on Kalshi face KYC requirements that exclude many international participants, potentially narrowing the book compared to Betfair's broader reach. Conversely, Polymarket's unregulated status in the US creates arbitrage opportunities for those with access to multiple venues.

Watch for Federal Reserve communications in July and early August, alongside Bitcoin's correlation to equity futures and any announced changes to US crypto custody regulations. Spot exchange volumes and funding rates on perpetual futures will signal positioning shifts in the fortnight before settlement.

Methodology

This page compares What price will Bitcoin hit August 17-23? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. 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). On-chain settlement clears in minutes — the fastest payout path of the four.

UK Frequently Asked Questions

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Polymarket vs Betfair Exchange: which is better for UK prediction trading?

Betfair Exchange offers UKGC regulation, GBP settlement, and potentially tax-free winnings — but focuses on sports and politics only. Polymarket has deeper liquidity, 0% platform fee, global event coverage, and crypto/geopolitical markets Betfair doesn't offer. For UK traders: Betfair for regulated GBP sports markets; Polymarket for broader, global prediction events.

Is Kalshi available in the UK?

Kalshi is a US CFTC-regulated prediction exchange. UK residents can create accounts but must use USD and US payment methods. Kalshi's product range overlaps with Polymarket but with lower liquidity on most contracts. For UK traders, Polymarket typically offers better prices due to higher global volume.