[The nominal trading volume of mainstream prediction platforms approached $3 billion in the past week] BlockBeats news, November 17, according to Dune data, the nominal trading volume of mainstream prediction platforms across the network approached $3 billion in the past week, reaching $2.998 billion. Among them, Kalshi and Polymarket both exceeded $1 billion, with $1.304 billion and $1.001 billion respectively, ranking first and second. Ranking third is BSC ecosystem Opinion, with a nominal trading volume of $665 million.