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 <0.04% of addresses took 70% of profits  —  Two months after quitting his job as a corporate C.P.A. to trade full time in prediction markets, Joel Holsinger, 26, was well along the road to making his first $100,000.

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