Polymarket is a global cryptocurrency-based prediction market, headquartered in Manhattan, New York City. Launched in 2020, it offers a platform where individuals can place bets on future outcomes, including sports matches, economic indicators, weather patterns, awards, and political and legislative outcomes. Participants can deposit USDC cryptocurrency through the Polygon blockchain network and trade shares that represent the likelihood of specific future outcomes.

The controversial nature of the betting markets offered by the company (which allow betting on military strikes and ongoing wars), as well as the ability of individuals with insider information to bet on outcomes, have been described by the Wall Street Journal as a "legal and ethical grey area." Numerous instances of suspicious trading have been observed on Polymarket, as well as attempts by gamblers to manipulate outcomes and pressure journalists to change reporting.

Polymarket has been banned by governments in multiple jurisdictions, such as France. The platform was initially blocked in the United States amid regulatory scrutiny. The second Donald Trump administration eased the regulatory environment for Polymarket. At the same time, Polymarket added Donald Trump Jr. as an advisor, after his firm 1789 Capital invested in Polymarket.

Wiki: https://en.wikipedia.org/wiki/Polymarket