I used to collect Yu Gi Oh cards as a kid, but my mom didn't liked it I was too 'obsessed' about Yu Gi Oh, so she threw them away.
There were like 200+ cards (I don't remember them much)
Now, I collect coins. This is one of my DIY displays:
(Sry for the sht image quality)
I also got a ton of useless items lying around that might be worthy in the future. like bank notes, a fully functioning PS2 and the thing you dance on (Idk what's it's called, I guess, the dance mat) and some vintage posters/paintings.