Kai and Speed finish their Minecraft marathon by 2026?

Platform comparison

Market context

Kai Cenat and IShowSpeed are starting a Hardcore Minecraft marathon on 7 August at 5:00 pm ET, and this market pays **Yes** if Kai’s Twitch broadcast of that run ends before 31 August at 11:59 pm ET and is not resumed within 12 hours. In prediction-market terms, a **Yes** share wins if that specific stream finish happens in time; a **No** share wins if the broadcast keeps going past the deadline or the run is effectively still live within the market’s rules.

The best historical guide is the pair’s own earlier marathon: they spent roughly 105 hours, reset the world 42 times, and only finished once the Ender Dragon finally fell.[2][4][5] That track record matters because it shows both how long these Hardcore runs can drag on and how suddenly they can end once the goal is reached. A 7% crowd-implied probability suggests traders currently think an end by late August is possible but not the base case, which is consistent with the fact that their previous challenge consumed several days of continuous play rather than wrapping quickly.[2][12][13]

What matters now are simple execution signals: whether they stick to the announced start time, whether the run remains a single continuous broadcast, and whether any deaths or technical breaks force a restart that extends the marathon.[15][16] Recent coverage says the new setup is even harder than before, with the finish line moved from one boss to four and no stated end date, so the odds of a long run rise if they keep progressing through the bosses in order.[15][16] Traders will likely watch for schedule posts, stream title changes, and any sign that the pair are pausing, switching platforms, or declaring the marathon complete.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.