With Stadia going defunct I was wondering if Stadia controllers will become collectors items? I know they will work on non-Stadia platforms, but was thinking perhaps they might accrue in value if not used.
That's a bit gambling to be honest ^^ It is possible that they go up in value after a longer time as you say as collectors items, but it's also possible that they will be worth nothing at all the longer you wait.
So up to you I would say.