It's cool to display the items.
According to articles I've read about coin display, several parameters must be considered into account:
1. Security: locked lockers, armored glass, Using jumbo screws to hang frames/shelves or cabinets. In favor of docking., etc.
2. Lighting - direct light may damage the quality of the coin/banknote. Natural lighting causes increased humidity which can cause a process of "excessive sweating" in the capsule that keeps the item—especially items with holograms.
So, in conclusion, there are items that are indeed nice to see daily or to show off to close friends. Still, the delicate items that require increased security or certain conditions are worth putting in a shady, locked place. And it is definitely worth using moisture-absorbing devices in these places for optimal and long-term preservation of your unique items.
I hope this helped someone
QB