Keeping CE's sealed...

[swedish]

i just started collecting because i like the figures that come with the CE's. when i got my last ce someone told me that i should keep it sealed (so it keeps its value) so was debating whether or not to open and display the contents. but then i cant display the figures !!! i also was contemplating buying 2 copies one to seal and 1 to display but that would be quite pricy.
it would get under my skin to have that figure locked in a box, the fallout bobble head needs air