Prediction-market trading volume has broken its old link to the crypto cycle: combined Kalshi and Polymarket volume climbed from under $5 billion a month in September 2025 to about $24 billion in April 2026, even as Bitcoin fell more than 45% from its October 2025 high. The growth engine is regulated US sports contracts, not crypto speculation.
Combined monthly global trading volume on Kalshi and Polymarket rose from less than $5 billion in September 2025 to about $24 billion in April 2026, according to Pew Research Center analysis of data from The Block. Over the same window Bitcoin (BTC) slid from an all-time high of $128,198 on October 6, 2025 to roughly $69,500 by June 2, 2026, a drawdown of more than 45%. The two series, once assumed to move together, have pulled apart — and this Deep Dive walks through the data, the mechanism, and where the relationship could snap back.
Key Facts:
• Combined Kalshi and Polymarket monthly volume rose from under $5 billion to about $24 billion between September 2025 and April 2026 — Pew Research Center / The Block
• Bitcoin fell from a $128,198 all-time high on October 6, 2025 to about $69,500 on June 2, 2026, down more than 45% — Yahoo Finance
• Kalshi recorded $5.42 billion and Polymarket $1.99 billion in April 2026 taker volume on a like-for-like measure — Dune Analytics
• Sports contracts made up 88% of Kalshi’s weekly volume in late April 2026, versus 46% at Polymarket — Dune Analytics
• Combined lifetime volume across the two venues crossed $150 billion in April 2026 — Dune Analytics
• Spot Bitcoin exchange-traded funds saw $2.30 billion of net outflows in May 2026, the largest monthly outflow of the year — Yahoo Finance
Methodology and its limits
This analysis pairs two time series: prediction-market trading volume and the Bitcoin spot price. Volume figures come from two sources with different conventions. Pew Research Center, citing The Block, measures “notional taker volume in US dollars,” counting each contract at its $1 notional value; on that basis the combined monthly figure reached about $24 billion in April 2026. A separate Dune Analytics dataset reports lower like-for-like taker volumes — $5.42 billion for Kalshi and $1.99 billion for Polymarket in April 2026 — because it counts settled trade value rather than notional. Bitcoin prices are daily closes via Yahoo Finance. The window is September 2025 to June 2026, short enough that any correlation estimate is in-sample only and should not be read as causal. Where the two volume conventions diverge, both are reported rather than blended.
The divergence, in numbers
The headline pattern is a widening gap. As Bitcoin rolled over from its October 2025 peak and ground lower through the first half of 2026, prediction-market volume did the opposite, compounding month over month to a record. That is the reverse of the relationship many traders assumed during the 2024 election cycle, when Polymarket’s crypto-native, USDC-settled markets rose and fell roughly in step with risk appetite across digital assets.
| Variable | Value | As of / window | Source |
|---|---|---|---|
| Bitcoin all-time high | $128,198 | October 6, 2025 | Yahoo Finance |
| Bitcoin price | $69,500 | June 2, 2026 | Yahoo Finance |
| Bitcoin drawdown from high | 45%+ | June 2, 2026 | Yahoo Finance |
| Combined prediction-market monthly volume | under $5bn → ~$24bn | Sept 2025 → April 2026 | Pew / The Block |
| Kalshi April taker volume | $5.42bn | April 2026 | Dune Analytics |
| Polymarket April taker volume | $1.99bn | April 2026 | Dune Analytics |
| Kalshi sports share of weekly volume | 88% | late April 2026 | Dune Analytics |
| Spot Bitcoin ETF net flows | −$2.30bn | May 2026 | Yahoo Finance |
Sources: Pew Research Center / The Block, Dune Analytics, Yahoo Finance. Time window: September 2025 – June 2026. Volume conventions differ between sources and are not blended.
The split is cleanest at the platform level. Polymarket, whose contracts settle in the stablecoin USDC and whose user base skews crypto-native, saw its volume slip about 9% month over month into April 2026. Kalshi, regulated by the Commodity Futures Trading Commission (CFTC) and funded in US dollars, set a record over the same period. In other words, the venue most tethered to crypto rails cooled with the token market, while the venue furthest from them accelerated. That is the empirical core of the decoupling: aggregate prediction-market growth is being carried by the dollar-funded, sports-heavy side of the industry, not the crypto-collateralised side that once tracked Bitcoin.
“As we look into 2026, there probably won’t be much headwind slowing this industry.”
— Jordan Bender, equity research analyst, Citizens (Gambling Insider)
Why sports, not Bitcoin, is driving the volume
The mechanism is a change in who the marginal user is. In the 2024 cycle, the heaviest prediction-market flow ran through Polymarket’s election contracts, collateralised in USDC and accessed largely by crypto holders; demand for those markets rose and fell with the same risk appetite that moved tokens. By 2026 the marginal dollar comes from a US retail sports bettor placing CFTC-regulated event contracts on Kalshi, where sports made up 88% of weekly volume in late April. That user funds an account from a bank, not a crypto wallet, and trades on the NFL schedule, not the Bitcoin chart. The result is a volume base whose seasonality and catalysts have almost nothing to do with the crypto cycle.
This is also a different revenue model from a sportsbook, which shapes how the volume behaves. “If your revenue equals your customers’ losses, you have a different business model,” Tarek Mansour, founder and chief executive of Kalshi, told a LionTree podcast carried by Boardroom — the point being that an exchange earning transaction fees on matched trades scales with turnover rather than with bettor losses. Higher turnover, not a rising token price, is the growth lever, and turnover is being supplied by sports. The same shift shows up in infrastructure: prediction markets are increasingly settling and routing away from purely crypto rails, a structural move covered in our analysis of why prediction markets are migrating off crypto rails.
The opposing read deserves a hearing. A bull on the old correlation would argue the decoupling is an artefact of a single bear leg in Bitcoin: in a renewed crypto rally, Polymarket’s USDC markets could re-accelerate and drag the aggregate back into step with tokens, restoring the historical link. That is plausible, and it is exactly why the relationship has to be stress-tested rather than declared dead — see our look at how Kalshi’s prediction-market grip met its NBA Finals stress test.
What prior decouplings tell us
The wagering economy has form for breaking its assumed links to crypto. Earlier in 2026, US iGaming revenue and spot Bitcoin ETF flows pulled apart after a period of apparent co-movement, a divergence examined in our piece on how US iGaming and Bitcoin ETF flows decoupled in Q1 2026. The lesson from that episode is that correlations between crypto and gambling tend to be regime-dependent: they hold while a single shared driver — risk appetite, retail speculation, stablecoin liquidity — dominates both series, then break when one side acquires its own, larger driver.
Prediction markets have now acquired exactly that. Regulated US sports contracts are a demand source an order of magnitude bigger than crypto-native election betting, and they answer to sports calendars, state-level legal fights, and mainstream retail adoption rather than to Bitcoin’s drawdown. The crypto cycle still matters — the broader macro backdrop, including the $2.30 billion of spot Bitcoin ETF outflows in May 2026, shapes overall risk sentiment, and that context is unpacked in our Bitcoin year-end market call. But it is no longer the marginal driver of prediction-market turnover, and that is what the data since September 2025 shows.
Prediction markets and conventional sportsbooks are “two separate things,” and “conventional sportsbooks and casinos are entertainment.”
— Michael Selig, chair, Commodity Futures Trading Commission (Axios)
Where this thesis breaks
The decoupling rests on the sports-driven, dollar-funded engine staying intact. It would weaken or reverse if any of the following fired:
- A renewed Bitcoin rally re-correlates Polymarket. If Bitcoin reclaims its prior range and Polymarket’s USDC-settled volume re-accelerates faster than Kalshi’s, the aggregate could move back in step with tokens and the decoupling would look cyclical, not structural.
- State or federal action curbs sports event contracts. The legal status of CFTC-regulated sports contracts is contested by several state regulators. A ruling that forces Kalshi to suspend sports markets would remove the very driver that broke the correlation, since sports is 88% of its weekly volume.
- A liquidity shock hits both at once. A broad risk-off event that drains stablecoin liquidity and freezes retail deposits would compress prediction-market volume and crypto together, temporarily restoring co-movement for the wrong reason.
- Volume conventions mask a real slowdown. Because Pew/The Block and Dune count volume differently, a flattering notional figure could hide softening settled turnover. A sustained fall in Dune’s like-for-like taker volume would be the earlier warning.
What to watch next
The near-term tells are calendar-driven. Watch the monthly volume prints from The Block and Dune through the 2026 NFL pre-season and into the autumn schedule: a continued rise into a flat or falling Bitcoin would harden the structural read. Track the state-versus-CFTC litigation over sports event contracts, where any injunction against Kalshi’s sports markets is the single biggest swing factor. On the crypto side, watch spot Bitcoin ETF flows — May 2026’s $2.30 billion outflow was the year’s largest — and whether a flow reversal coincides with any pickup in Polymarket’s USDC volume. If prediction-market volume keeps climbing while Bitcoin and ETF flows stay soft, the decoupling is real; if they turn together, it was cyclical.
TL;DR
Prediction-market volume has decoupled from the crypto cycle. Combined Kalshi and Polymarket monthly volume rose from under $5 billion in September 2025 to about $24 billion in April 2026 (Pew Research Center / The Block), even as Bitcoin fell more than 45% from its October 2025 high. The driver is regulated US sports contracts — 88% of Kalshi’s weekly volume — not crypto speculation. The thesis breaks if a Bitcoin rally re-correlates Polymarket’s USDC markets, or if state or CFTC action curbs sports event contracts and removes the engine.
FAQ
Has prediction-market volume really decoupled from Bitcoin?
On the data since September 2025, yes. Combined Kalshi and Polymarket monthly volume rose to about $24 billion by April 2026 (Pew Research Center / The Block) while Bitcoin fell more than 45% from its October 2025 high. The window is short, so the relationship is in-sample, but the direction is clear: volume rose as the token fell.
Why is Kalshi growing while Polymarket cooled?
Kalshi is CFTC-regulated and dollar-funded, with sports making up 88% of weekly volume in late April 2026. Polymarket settles in USDC and skews crypto-native, so its volume tracks risk appetite more closely and slipped about 9% into April. The dollar-funded, sports-heavy side is carrying aggregate growth.
Does this mean crypto no longer matters for prediction markets?
Not entirely. Crypto still shapes overall risk sentiment and Polymarket’s collateral. But it is no longer the marginal driver of total turnover, which is now set by US sports demand and the legal status of event contracts rather than by Bitcoin’s price.
What would prove the decoupling wrong?
A renewed Bitcoin rally that re-accelerates Polymarket’s USDC volume faster than Kalshi’s would suggest the split was cyclical. So would a state or federal ruling curbing sports event contracts, which would remove the sports engine behind the divergence.
Are the volume figures reliable?
They are directional, not precise. Pew/The Block count notional taker volume at $1 per contract, while Dune Analytics reports lower settled taker value. Both are reported here rather than blended, and a sustained fall in Dune’s like-for-like figure would be the earliest sign of a real slowdown.
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