Bitcoin was little changed Saturday at around $84,829, up roughly 0.6% from Friday’s close, as prediction markets (venues for trading outcome contracts) and two AI heavyweights offered contrasting views on its Dec. 31 price. Kalshi’s crowd remained relatively close to current levels, while Polymarket left open the possibility of another six-figure price; both AI models envisioned a higher finish. The subdued session followed a volatile Friday in which bitcoin rose from roughly $84,600-$84,800 to $87,100-$87,240 before closing near $84,300-$84,500. Saturday’s trading range was narrow by comparison.