Degen Season Never Ends: Polymarket and Kalshi Soak Up $25.7B in March Madness

Prediction markets just keep printing money like they're running a printing press in a basement somewhere. Dune Analytics data shows seven platforms tallied a whopping $25.7 billion in notional volume during March—marking the second-highest month on record over the past two years. Polymarket and Kalshi, as per usual, absolutely dominated the action like two gorillas fighting over the last banana.

The breakdown? Kalshi took the lead with roughly $13 billion in volume, while Polymarket followed closely behind at around $10 billion. Rounding out the field were Crypto.com, Opinion, Limitless, Predict.fun, and Overtime—though they're essentially fighting for crumbs compared to the big two. Cute effort, everyone else, but this is a two-horse race and y'all are watching from the fence.

Trading activity also spiked hard. March saw approximately 207 million transactions across all tracked prediction markets, a solid jump from February's 155 million. Polymarket alone processed 115 million trades, with Kalshi not far behind at 88 million. For context, that's more transactions than some entire blockchains handle in a month. The degens are absolutely feral out here.

On the open interest front, the two giants hold about $940 million combined. Kalshi leads with $487.21 million, while Polymarket sits at $422.09 million. The rest of the pack? Predict.fun has $19.51 million, Opinion holds $10.38 million, and Limitless is clinging to roughly $666,520. Yikes. That's barely enough to buy a decent used car, let alone compete with the big boys.

Polymarket's volume continues being driven primarily by politics, followed by crypto, sports, and global events. Meanwhile, Kalshi sees heavy activity in economics, financials, and politics, with some niche action in climate, weather, and transportation. Basically Polymarket is where you go to bet on whether the world burns, and Kalshi is where you go to bet on whether your 401k survives the burn.

Looking at the bigger picture, January 2026 hit a record $26.75 billion, February pulled $23.24 billion, and with April still incomplete at $3.9 billion, the cumulative total since January 2024 sits at a staggering $162.64 billion. That's enough to buy a small island—or, in crypto terms, roughly three blue-chip NFTs at peak mania prices.

Of course, it's not all smooth sailing. Both platforms are dealing with regulatory headwinds—CFTC scrutiny, state-level rules that conflict with federal guidance, and Democratic lawmakers pushing for tighter oversight. There's also been controversy around markets tied to the U.S.-Iran conflict. Nothing says "fun weekend activity" like getting investigated by the CFTC while simultaneously betting on geopolitical outcomes. Very normal, very fine.

Still, volume and open interest keep climbing. Whether that momentum holds as regulators circle remains to be seen, but prediction markets have clearly become a permanent fixture in the crypto landscape. The genie is out of the bottle, and frankly, nobody wants to put it back.