Prediction markets have processed more than $154 billion in total volume, with daily trading volume on Polymarket alone often exceeding $300 million.

The scale raises a more important question. These platforms no longer resemble niche betting offices. They increasingly resemble retail stock trading.

This analysis uses on-chain data, primarily from Polymarket—the largest platform in terms of users and transactions in a market dominated by a Polymarket-Kalshi duopoly—to directly assess this shift.

Across four dimensions — who participates, how they behave, how capital moves, and on what scale — the volume growth pattern is clear.

Also, the mix of categories emphasizes this picture: crypto and politics (without sports) now lead the weekly volume on Polymarket. Additionally, the categories of economy and earnings are growing. These are not traditional gambling categories. They are financially-focused sectors.

Notably, contracts for sporting events are already being offered as CFTC-regulated financial products by Kalshi and distributed through Robinhood’s Predictions Hub. Thus, they stand alongside stocks, options, and crypto in one investment environment.

The most striking signal is not how much money flows through prediction markets. It is who is doing the trading.

On Polymarket, the median stake is $10, according to BeInCrypto's exclusive dashboard. The average is $89, but this is pulled up by a small group of large players.

The distribution makes it clearer: about 20% of all wallets make transactions between $0 and $10, another 27% are between $10 and $50, and about 11% are between $50 and $100.

In total, more than 57% of users trade for less than $100, and more than 80% make transactions under $500.

This market is not determined by whales. It is a market built from small, individual participants trading modest amounts. This pattern also occurred during the rise of retail stock trading.

In comparison: Robinhood reported a median account size of $240 and the average is about $5,000, according to CEO Vlad Tenev in 2021. The structural similarities are clear: prediction markets attract the same small participants that have changed the stock market over the past five years.

Users behave like traders, not like gamblers

Participation alone does not immediately make a platform a financial platform instead of a gambling site. The frequency of interaction does.

A gambler places a bet and waits. A trader opens positions, adjusts them, closes them, and opens again. The transactions-per-active-user ratio clearly shows this difference.

On Polymarket, this figure now stands around 25 transactions per daily active user—that means the average active participant executes 25 transactions per day. Earlier this year, the peak even approached 37.

In comparison: for most of mid-2025, the ratio hovered between 3 and 5. The structural jump from late 2025 shows a clear behavioral change: users no longer place a single bet and then drop out, but actively manage positions in multiple markets.

This pattern has a directly comparable development in the crypto market. A Kaiko research report on Binance found that the exchange processed 61.9 million trades in a day, with $20 billion in spot volume in December 2025. This means small average trade sizes and frequent transactions via its 300 million registered accounts.

Trading with high frequency and small amounts is typical for retail finance, whether it's a stock, a token, or a contract on a prediction market.

Capital is always in motion

If users behave like traders, then the capital dynamics should confirm that. They do. Polymarket currently holds about $445 million in total value, while the open interest is around $477 million.

The nearly equal values of these two figures say something specific: almost all the capital staked is actively deployed in open positions and is therefore not idle. This is not passive liquidity, but working capital.

The ratio between volume and open interest illustrates this well. With a daily taker volume of about $339 million and an open interest of $477 million, the ratio comes out to 0.71. Capital is not only being staked, it is also continuously rotating.

Positions are opened, closed, and re-entered at a pace that indicates ongoing portfolio management, rather than just responding to an event. A low vol-OI ratio would indicate more gambling-like behavior.

In a traditional gambling market, capital usually remains locked up until the outcome is determined. Here, it circulates. That distinction is important: it indicates that participants use capital as a means to manage risk, not as a one-time bet on just one outcome.

This is no longer event-driven growth

The behavior and capital usage described above are already remarkable at low volumes. But this is about much higher volumes.

The weekly volume on Polymarket is consistently above $1 billion each week in Q1 2026, with recent weeks even exceeding $2.5 billion. The 7-week average is now over $2 billion.

Monthly volumes have increased from about $1 billion in mid-2025 to over $8 billion in March 2026. The growth line is therefore not solely due to a single event.

The volume spreads across different categories: sports, crypto, and politics. Each contributed significantly in the most recent week, with economy, weather, and culture adding even more spread.

This spread distinguishes structural growth from spikes due to isolated events. A presidential election can cause a temporary spike.

Sustained, growing volumes in sports, crypto, macro, and culture indicate a user group that is regularly active on prediction markets, not just occasionally, as is the case with many retail investors.

What the data from prediction markets says

Each factor reinforces the next in a logical chain. Most participants are small, retail users. They trade often, not just once, but dozens of times per session.

The capital they stake is almost entirely active, and rotates continuously between different positions rather than sitting idle. This behavior is seen with billions of dollars in monthly volume, across more and more categories.

If small users make up the majority of the trading, frequently execute trades, and continuously stake their capital on a large scale, it begins to resemble a retail financial market rather than a gambling platform.

Prediction markets are no longer just intended to predict outcomes. They are evolving into retail trading platforms for real events, where participants express their opinions, manage risk, and stake capital with a frequency and discipline that resembles that of stock markets.