Any ideas of what I can do with these display cases?

I found these two display cases in the trash room of my building. They are in perfect condition so of course I couldn't not take them home. Trouble is, I've got no plans for them. Literally none. I am not a collector of anything but fully considered taking up a Funko Pop hobby just to have something to use the cases for, though that's not really an interest I can see myself sustaining. Other ideas I've had are:

• Convert into bookshelves (not enough shelves inside to support this)
• Display large plants (seems impractical due to low light and I can't find strip grow lights for the inside)
• Create a magical large scale terrarium with lots of minis of little creatures (fun and whimsical, but entirely too ambitious for my first terrarium project)

Any ideas of how to A) make one of the above ideas work with a little crafting or B) purpose the cases for something else entirely.

Much appreciated 👏