There is money in the market on top pop., modern coinage . If your ever looking to try and do that . Pcgs is the only way to go . Lots of rich old people, building registry sets, these days .
As long as the copper plating isn't breached, the coin should behave like any other copper coin in a slab. Even if there are microscopic breaches in the plating, being sealed in a slab should protect the coin a lot longer than if it was raw (yes, I know slabs aren't 100% airtight, but they do protect from a lot more environmental hazards than most 2x2's, flips, or standard albums).