Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
19% | 81% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
19% | 81% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 180-199 | 19% |
| 200-219 | 18% |
| 160-179 | 14% |
| 220-239 | 14% |
| 240-259 | 11% |
| 140-159 | 8% |
| 260-279 | 7% |
| 120-139 | 3% |
| 280-299 | 3% |
| 300-319 | 2% |
| 100-119 | 1% |
| 320-339 | 1% |
| 340-359 | 1% |
| 360-379 | 1% |
| <20 | 0% |
| 20-39 | 0% |
| 40-59 | 0% |
| 60-79 | 0% |
| 80-99 | 0% |
| 380-399 | 0% |
| 400-419 | 0% |
| 420-439 | 0% |
| 440-459 | 0% |
| 460-479 | 0% |
| 480-499 | 0% |
| 500+ | 0% |
Market context
Elon Musk’s X activity over the 11–18 August window will be counted by a tracker that includes main-feed posts, quote posts and reposts, but excludes replies unless they appear as main-feed posts captured by the tracker. That matters because the settlement is a simple count, not a judgement call: deletions still count if they are live long enough to be recorded, so the market is effectively pricing his posting cadence as observed in real time rather than his final visible timeline.[1][2]
Comparable tweet-count markets on Musk have often traded around very wide ranges, with the week-to-week total swinging sharply enough that a zero-implied price can still leave room for a burst of activity if he is engaged on product, politics or platform issues.[10][12] The live tracker currently shows no posts logged for the August 11–18 market yet, while the broader August 2026 market has been quoted with the highest probabilities around the 880–919 and 1000+ bins, underscoring that traders expect heavy posting at some point this month rather than a steady, low-volume pattern.[1][11]
Catalysts to watch are any Tesla, SpaceX, xAI or X-related announcements, together with broader macro headlines that tend to pull Musk back into the feed. Recent coverage has also shown DOGE and government-oversight disputes can trigger bursts of commentary, while market-wide crypto conditions may matter indirectly if BTC and ETH volatility sharpen the tone on X or coincide with funding-rate resets and whale-driven flows across majors.[7][15] Since settlement is on a USDC-based prediction market, traders will also be watching whether liquidity stays concentrated in the front-end as the window opens and closes, because that can move the quoted probability even before Musk posts anything.[2]
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
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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.
- 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%.
Trade Elon Musk # tweets August 11 - August 18, 2026? on BTC Prediction
Live order book, 0% fees, USDC settlement in seconds.
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