Six months ago, prediction markets barely registered as a blip on the crypto trading radar, accounting for roughly 1% of centralized spot exchange volume. That number has now climbed to nearly 5%.

To put that in perspective: prediction market monthly volumes hit $25.7 billion in March 2026, a 10.6% jump from February. A year earlier, monthly volumes hovered around $1.2 billion. That’s more than a 20-fold increase in under 12 months.

From novelty to real volume

Monthly prediction market volumes scaled from $1.2 billion in early 2025 to north of $20 billion by January 2026. By March 2026, the figure had ballooned to $25.7 billion.

Meanwhile, centralized crypto spot volumes have held relatively steady in the $1 to $2 trillion-plus monthly range.

Platforms like Polymarket and Kalshi have been the primary beneficiaries. Polymarket, which primarily uses USDC for its trading infrastructure, has carved out a dominant position in the space. Binance has entered the fray, expanding its prediction market offerings.

Sports, politics, and crypto drive the action

These three categories account for a substantial share of trading activity on both Polymarket and Kalshi. A weekly snapshot from March 2026 showed crypto-specific prediction market volumes alone hitting approximately $900 million.

The thin-trading problem nobody wants to talk about

CNBC reported that many contracts on both Polymarket and Kalshi see minimal trading activity. The headline volume numbers are impressive, but they’re heavily concentrated in a relatively small number of popular markets. The long tail of contracts, covering niche events and less popular outcomes, often lacks the liquidity needed for efficient price discovery.

What this means for investors

For traders, the opportunities are real but come with important caveats. The $25.7 billion in monthly volume demonstrates clear demand, but participants need to pay close attention to liquidity in individual contracts. A market with impressive aggregate volume but thin depth in specific contracts can create execution risk, particularly for larger positions.

The Block now maintains a dedicated dashboard tracking the prediction markets-to-spot exchanges volume ratio. At nearly 5% of spot volume and climbing, prediction markets appear to have crossed that line.