Stumbled upon a pristine sealed game from the 16-bit era in a bin of junk: moral dilemma time

Last weekend, I was digging through a flea market and found a perfect-condition sealed cartridge from the early 90s. On one hand, opening it to experience the game as intended feels right, but on the other, keeping it sealed preserves its collectible value and history. What would you do in this situation, play it or preserve it?