6 min read
Bitcoin prediction markets

Last updated · prices and market lists verified against live Polymarket and Kalshi books on August 18, 2026
Quick answer
Key takeaways
- › Contracts pay $1 if the price condition is true at expiry, $0 if not.
- › Polymarket carries the deepest BTC strike liquidity; Kalshi is the regulated USD venue.
- › Daily 'above $X' markets and monthly 'what price will BTC hit' baskets are the highest-volume formats.
- › Settlement is a single timestamp against a reference index — not a touch during the day.
- › A downside YES strike is defined-risk insurance: no margin, no liquidation.
- › Both venues accept Florida residents; Florida charges no state income tax on gains.
How a Bitcoin contract works
Every BTC market reduces to one sentence: will Bitcoin be above this price at this exact moment? If you buy YES at 38¢ and it resolves true, you collect $1 — a 163% return on risk. If it resolves false, you lose the 38¢. There is no leverage, no liquidation price, and no funding rate.
Because prices are quoted in cents, the market is telling you a probability. A 38¢ YES on "BTC above $125,000 on August 31" is the crowd saying there's roughly a 38% chance. That's the number to argue with — not the headline price.
Polymarket vs Kalshi for BTC
| Polymarket | Kalshi | |
|---|---|---|
| BTC book depth | Deepest — daily strikes often $1M+ in 24h volume | Solid on headline strikes, thinner on long tails |
| Regulation | Offshore/onchain; not CFTC-registered for U.S. retail history | CFTC-regulated designated contract market |
| Funding | USDC wallet or card on-ramp | USD — ACH, wire, debit |
| Strike granularity | Daily, weekly, monthly, plus laddered price baskets | Mostly daily and monthly ranges |
| Tax paperwork | You track it yourself | U.S. forms issued |
Practical split most traders land on: price discovery and short-dated action on Polymarket, size and USD settlement on Kalshi.
The four BTC market types
- Daily strike: "Bitcoin above ___ on [today]" — highest turnover, resolves same day, brutal on late entries.
- Weekly basket: "What price will Bitcoin hit August 3–9?" — laddered strikes; you can build a range view instead of a single yes/no.
- Monthly basket: same shape, month-long horizon; the friendliest format for a macro thesis.
- Event contracts: ETF flows, reserve announcements, halving-adjacent milestones — thinner, but the biggest mispricings live here.
The settlement trap that costs beginners money
"Above $120,000" almost never means "traded above $120,000 at some point." It means the reference price at the resolution timestamp — usually 12:00 PM or 5:00 PM ET on the stated date. Bitcoin can spike through your strike at 3 AM and you still lose. Read the rules tab before you size anything, and note the exact index used, because thin-liquidity wicks on one exchange don't move a composite index.
Hedging a spot bag with defined risk
Say you hold $25,000 in BTC and don't want to sell into a tax event. Buying YES on "Bitcoin below $95,000 on September 30" at 18¢ costs $4,500 for a $25,000 payout if the drawdown lands. Compare that to a perp short: no liquidation, no funding, and the worst case is a known number you decided in advance.
Two rules keep this sane. First, hedge a fraction of the bag, not all of it — insurance you can't afford isn't insurance. Second, choose an expiry past the event you're afraid of, not before it.
Florida notes
Florida residents can trade on both venues, and unlike sportsbook wagers routed through Hard Rock Bet, these are financial event contracts rather than state-licensed sports betting. Florida levies no state income tax, so the only tax layer is federal — but the recordkeeping burden sits on you for USDC-settled Polymarket activity. Keep a simple ledger of entry price, size, and resolution for every position.
Miami's crypto concentration shows up in the order books: U.S. morning hours see the tightest spreads on daily strikes, and liquidity thins noticeably after 8 PM ET.
Start trading in 2 minutes
Both platforms are free to sign up. Kalshi is CFTC-regulated USD. Polymarket settles in USDC.
Play responsibly
Prediction markets are real-money trading and you can lose your full stake. We recommend 21+. If trading stops feeling fun, call 1-800-GAMBLER or text 988.
Reviewed by Catie Di Stefano. Every guide follows our editorial standards & review methodology. Affiliate links are disclosed under our affiliate disclosure.