[Polymarket Founder Participated in Ethereum ICO During High School] October 13 news, according to Fortune magazine, Kalshi and Polymarket are engaged in a competition for dominance in the prediction market. Kalshi is eager to add crypto features, but catching up with its competitor is not easy—Polymarket has been settling transactions on the Polygon Layer 2 network since its inception. Its founder, Shayne Coplan (now 27 years old), even participated in the Ethereum ICO during high school.