A look at Kalshi and Polymarket's rise; reports say Polymarket had 491K monthly active traders in December 2025, and <0.04% of addresses took 70% of profits (Benjamin Wallace/New York Times)

Benjamin Wallace / New York Times: A look at Kalshi and Polymarket's rise; reports say Polymarket had 491K monthly active traders in December 2025, and

A look at Kalshi and Polymarket's rise; reports say Polymarket had 491K monthly active traders in December 2025, and <0.04% of addresses took 70% of profits (Benjamin Wallace/New York Times)
Benjamin Wallace / New York Times: A look at Kalshi and Polymarket's rise; reports say Polymarket had 491K monthly active traders in December 2025, and