Trader consensus on "No" at 99.3% market-implied odds stems from the overwhelming scientific record—satellite data, gravitational measurements, and centuries of navigation—that has long established Earth's spherical shape. This skin-in-the-game sentiment dismisses fringe flat-Earth narratives as cultural outliers without credible traction in mainstream discourse or evidence-based circles. Historical patterns in science communication show such ideas linger in niche online communities yet rarely shift broader public or institutional views. No near-term catalysts, such as major announcements or viral campaigns, appear positioned to alter the outcome, though an unprecedented global revelation would be required for any realistic upset.