Hold or trade - Celebrations UPC

Hi everyone! I have a case of 25th anniversary Celebrations UPC’s (ultra premium collections) and am being offered by some friends who own their own TCG stores to trade for singles and slabs at the same value.

A few things to note: - the amount of space the UPC’s takes up isn’t currently an issue - I originally planned on holding the UPC’s long term (Over 20 years)

My original thought was that the UPC’s being from a special milestone would boost its value in the long run, but my friends argued that vintage WOTC cards would also have the same effect if not better, which is what changed my mind recently.

Thoughts on what I should do?