Kai and Speed finish their Minecraft marathon by 2026?

Platform comparison

Market context

Kai Cenat and IShowSpeed are running a hardcore Minecraft marathon that began on 7 August at 5 p.m. ET, and the market is pricing only a **6%** chance that Kai’s Twitch broadcast ends before the settlement window closes. That makes **No** the clear favourite, with the consensus leaning on the idea that this is a long-form endurance stream rather than a short event, while the small sliver of **Yes** value sits with traders expecting an abrupt stop, a failed run, or an unscheduled break that does not resume within the 12-hour rule.

The historical benchmark cuts both ways. Their previous hardcore Minecraft marathon ran for roughly **105 hours** before they finally beat the Ender Dragon, with reports putting the total at 42 deaths and about four days of streaming, so a multi-day broadcast is well within precedent.[2][4][5][6] That history supports a low implied probability for an early finish, but it also shows that the duo can end the stream once the objective is completed, which is the main contrarian angle if this run is materially more ambitious than the last one.[12][14] Coverage around the new challenge says the goal has been expanded beyond a single dragon fight, with the run framed as a tougher “all bosses” style marathon, which would normally argue for even longer airtime than the 2024 finish.[16][17]

For catalysts, traders should watch for any official schedule changes, progress updates, or signs that the pair have reached a decisive phase of the run, because a clean completion would likely trigger a same-day shutdown of Kai’s Twitch broadcast.[16][17] The key dependency is whether the marathon is still following the planned continuous format on Kai’s channel, since the settlement depends on the Twitch stream ending and not resuming within 12 hours.[1] If the run stalls, pauses, or moves between channels without Kai’s Twitch broadcast formally ending, that would tend to support the underdog **No** side rather than the short-priced **Yes**.

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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%.