Crypto Prediction Markets Under Fire: Congress Moves to Ban War Contracts Amid Insider Trading Concerns

Blockchain investigators have uncovered a deeply troubling pattern of highly accurate bets on U.S. military operations, raising urgent questions about whether prediction markets have become a vector for intelligence leaks and national security breaches.

Bubblemaps, a blockchain analytics firm, identified 80 wagers on the Polymarket platform that achieved a remarkable 98% win rate when predicting American military actions targeting Iran. Analysts at the firm assert that statistical probability alone cannot explain such consistent accuracy.

"The issue here is they can make war plans accordingly," said Nicolas Vaiman, co-founder and CEO of Bubblemaps, in an interview with CoinDesk. "Just to put it bluntly, this could potentially expose the lives of many people."

Vaiman warned that if researchers can detect irregular trading patterns on prediction markets, so can adversaries of the United States. Foreign intelligence services could potentially exploit these platforms to glean insights into American war plans, effectively turning speculative betting markets into tools of intelligence gathering.

Congressional Response Gains Momentum

The revelations have accelerated legislative efforts to restrict prediction market activity involving armed conflict. Representative Mike Levin recently stated on social media that the "insider trading problem with prediction markets is bigger than any of us could have known." He and Senator Adam Schiff have introduced the DEATH BETS Act, legislation designed to prohibit contracts related to military operations.

The timing of these bets has drawn particular scrutiny. On-chain data analyzed by Bubblemaps revealed that several major, high-conviction wagers were placed days before the February 28 surprise attacks on Iran, including predictions regarding the removal of its supreme leader and the announcement of a ceasefire.

According to the investigation, nine accounts connected to Polymarket collectively generated more than $2.4 million by betting almost exclusively on U.S. military operations. These accounts reportedly placed smaller losing bets on February 20, likely as a cover to avoid detection.

"They just didn't bet on U.S. strikes days before they took place, but across multiple later dates to maximize profit," Vaiman explained.

A 98% Win Rate Proves Difficult to Conceal

Executing dozens of bets with near-perfect accuracy inevitably attracts attention. During the Iran strikes, civilians reportedly monitored Polymarket to determine whether they should seek shelter in bunkers, illustrating how closely both governments and potential adversaries observe these markets.

"During the Iran strikes, civilians were reportedly checking Polymarket to decide whether they should sleep in bunkers or not," Vaiman noted. "So yes, governments and potential enemies are probably watching that closely."

When questioned about potential connections between the traders and U.S. government personnel, Vaiman clarified: "We have no proof these are military insiders or even Americans." He emphasized that while the data appears suspicious and may indicate someone possessing an unfair informational advantage, definitive attribution remains elusive.

Enforcement Action and Platform Response

At least one arrest has materialized in connection with these concerns. Master Sergeant Gannon Ken Van Dyke, a U.S. Army Green Beret, reportedly earned $400,000 from Polymarket bets placed on the Venezuela raid intended to extract President Nicolas Maduro—an operation in which he participated.

Bubblemaps publicly released its findings on May 18 through social media posts containing graphical evidence demonstrating the statistically improbable timing accuracy of each bet.

Polymarket has pushed back against insider trading allegations, maintaining that it employs strict policies against market manipulation. The platform highlighted its use of AI-powered surveillance and blockchain forensics to identify suspicious activity and report findings to relevant authorities.

Two weeks prior to Bubblemaps' disclosure, Polymarket announced a partnership with Chainalysis to implement what it described as "Wall Street-grade supervision," signaling commitment to addressing compliance deficiencies.

The Manipulation Threat

Beyond insider trading, Vaiman raised additional concerns about potential market manipulation by state actors. "A government could intentionally place bets to create a false signal and mislead adversaries into thinking something is about to happen," he observed. "Prediction markets are intelligence and information warfare tools."

Vaiman acknowledged that these markets do not merely predict future events—they can actively influence outcomes. He also noted cases where journalists faced extortion threats from bettors seeking to protect their financial positions.

Despite his concerns, Vaiman refrained from placing blame solely on Polymarket's infrastructure. "I don't want to dunk on Polymarket," he stated. "Realistically, anybody can use a cheap VPN or buy a KYC'd account. That is not just a Polymarket problem. It is an internet-wide problem."

Coinasity's Take

The Bubblemaps investigation exposes a fundamental tension between the transparency that blockchain technology promises and the security risks that transparency creates when applied to sensitive geopolitical events. Prediction markets offer genuine value in aggregating dispersed information, but that very function becomes dangerous when the information relates to military operations.

The DEATH BETS Act represents a reasonable congressional response, though its effectiveness will depend on enforcement mechanisms and international cooperation. Platforms like Polymarket face an impossible balancing act: maintaining the openness that makes their markets useful while preventing sophisticated bad actors from exploiting them.

The arrest of Master Sergeant Van Dyke demonstrates that enforcement is achievable, but it likely represents merely the surface of a much deeper problem. Until prediction markets implement robust identity verification and cross-platform intelligence sharing, the risk of national security breaches will persist.

For investors and observers, this episode underscores that not all on-chain data is created equal—and that regulatory clarity remains essential for the sustainable growth of Web3 markets.