I don't look at my cards thru the lens of value or what they may go for on the market. With that said, I bust open anything slabbed, encased, graded, etc. I won't pay a premium for this cards as it is so I have no qualms freeing them from any plastic prison they are in. Mind you, some of the encasing is more for shipping purposes than anything else.
I don't have any factory sets either, I bust them all open. Example, I got my 2023 Topps set and as soon as I got it, broke it open and sorted it as I see fit. Others would throw a conniption with the thought of it being opened...ruin its future "value". Value to me is enjoying what you have. Collector, not investor.
Tired and trembling
I am descending,
will I have to stay here
and live this life again?