Ken Griffey Jr’s 1989 Upper Deck rookie card just doubled in value in 2025, shooting past $5,000—even though it’s not rare! Collectors are buzzing: is this the new normal, or are we about to see a wild crash like in 2021? Either way, the Griffey card drama is the juiciest thing in the hobby right now. Would you hold or sell? #News #KenGriffeyJr #SportsCards