Hand holding a Bitcoin coin in front of a trading chart. Source: TechGaged / Shutterstock Polymarket has finalized one of the most controversial crypto prediction markets of 2026 after UMA token holders overwhelmingly backed a “No” resolution in a dispute involving Strategy’s first Bitcoin (BTC) sale since 2022. The decision ends days of challenges and debate, but it has also intensified criticism from traders who argue the platform resolved the market against the underlying event itself. At the center of the dispute was a simple question: did Strategy sell any Bitcoin before May 31?