Open or keep sealed?

Im sure this question has been many asked on this forum but i want your guy's input.

do you guys keep your anime collector boxes, blu rays, etc sealed?

I just started collecting merch and box sets for the 2006 anime eureka seven and i have most of the box sets but I have kept them sealed so far for the sake of the condition and just in my collector mind it has this sense of uniqueness and preservation by keeping them sealed. Its also a old anime so thats another reason a part of me keeps them sealed

but i also do want whats inside the boxes to complete other parts of the collection so im debating whether or not to either open the boxes or order the same boxes and just open those up and put them somewhere while i keep the other ones sealed.