Based on the provided market context, the most popular sports market on Predyx can be determined by looking at the volume of sats (volumeSats) traded in each market, as higher volume typically indicates greater user interest and activity. Among the listed markets, the Super Bowl Winner 2026 (Market 5) shows the highest cumulative trading volume across its outcomes, with individual team volumes like the Buffalo Bills at 556,125.611 sats and Baltimore Ravens at 551,933.167 sats, surpassing the volumes in other markets like NBA Champion (Market 1) or Stanley Cup Champion 2025 (Market 2). Therefore, the Super Bowl Winner 2026 appears to be the most popular sports market on Predyx right now.