Yahoo Finance outlines four key uncertainties for 2026: tech giants continuing despite AI skepticism, possible turmoil around the next Federal Reserve Chair appointment, growing popularity and scrutiny of prediction markets, and the expanding influence of the 'Musk Trade' especially with a potential SpaceX IPO. Coinbase and Kalshi's partnership is expanding prediction market access beyond Robinhood, raising regulatory and ethical questions. The speculation around SpaceX's IPO presents a strategic shift in Elon Musk's investment landscape.