Open interest (OI) in prediction markets has topped $1 billion for the first time. New platforms are entering the competition beyond Polymarket and Kalshi as market liquidity rises and the user base expands.

Prediction market open interest stands at $1.066 billion, with $564 million locked in trading pairs, according to DeFi Llama data cited by Cryptopolitan on Feb. 9. As prediction markets expand, open interest is sustaining higher activity compared with a temporary spike in 2024.

Prediction markets still have less liquidity than exchanges, but open interest is growing exponentially and could compete with major decentralised exchanges. Growth has accelerated over the past 3 months as new wallets have flowed in and a wider range of markets has expanded.

In the short term, Super Bowl outcome forecasts are likely to lead the market. Trading related to the Winter Olympics is also active, and medal prediction markets recorded $4 million in trading. On Polymarket, events and politics are major categories, and short-term trades such as 15-minute Bitcoin price forecasts are also becoming active.

Market composition also differs by platform. Kalshi is strong in sports predictions and has a structure similar to general sports betting platforms. Polymarket, by contrast, offers broad categories, including predictions related to Donald Trump.

Some have raised the possibility that prediction markets could replace cryptocurrency trading. Polymarket and Kalshi reported high trading volume, but competitor Opinion showed lower trading levels, underscoring differentiation within the market. Prediction markets have an advantage in that they are less susceptible to manipulation, and most platforms use fiat currency links or regulated stablecoins such as USDC.