The most valuable thing I own is my pokemon card collection. I was obsessed when I was kid, but unlike everyone, I kept going through Rocket, Gym heroes and challenge, all the way to Neo Destiny and Legendary Collection. Possibly the rarest cards I have are two 1ed foil discovery Tyranitars and one 1ed foil Blaine's Charizard. My cards are very well loved and things have calmed down since the pandemic, but it was very weird, especially considering I got a booster box of Neo Discover for 50 bucks in 2009