Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
46% | 54% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
46% | 54% | 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 |
|---|---|
| 120-139 | 46% |
| 140-159 | 26% |
| 160-179 | 6% |
| 200+ | 4% |
| 180-199 | 3% |
| <20 | 0% |
| 20-39 | 0% |
| 40-59 | 0% |
| 60-79 | 0% |
| 80-99 | 0% |
| 100-119 | 0% |
Market context
Donald Trump’s Truth Social activity is the underlying event here, with the market counting main-feed posts, quote posts and reposts made between 28 July at 12:00 PM ET and 4 August at 12:00 PM ET. Because the settlement is based on a post counter rather than sentiment or content, the key question is simply whether he stays active on the main feed, including any reposts that remain visible long enough to be captured by the tracker. The current 0% YES implication is hard to reconcile with the recent pattern of heavy, bursty posting, so the market is effectively pricing an extreme outlier outcome.
Recent history argues for caution in assuming a low count. Trump has repeatedly produced high-volume posting clusters on Truth Social, including more than 25 posts in a single Sunday window, around 43 posts in roughly six hours, and over 100 posts across an eleven-hour stretch in July coverage. NPR reported that in the first four months of 2026 he averaged nearly 19 posts per day, with politics, Iran and the economy among the most frequent themes[11]. That profile suggests the distribution is fat-tailed: quiet stretches do happen, but so do sudden surges that can dominate a settlement window.
Traders should watch for campaign-style announcements, foreign-policy flashpoints and any media cycle that prompts reactive posting, because those have previously coincided with posting bursts[3][6][11]. The recent reporting that Truth Social is selling early access to posts via a premium “Truth API” is also relevant for market plumbing, since it could change how quickly information is reflected elsewhere even if it does not alter the count itself[17]. In a crypto-linked context, faster dissemination can matter for sentiment around BTC and ETH when Trump’s posts touch regulation, tariffs or geopolitics, though the contract itself settles only on the number of qualifying Truth Social posts.
Methodology
This page reads Donald Trump # Truth Social posts July 28 - August 4, 2026? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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.
FAQ
- 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.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
Trade Donald Trump # Truth Social posts July 28 - August 4… on BTC Prediction
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