The sealed LP... what is the point?

As a collector of LP's, I have several sealed LP's. It occured to me that the real reason one has a sealed LP is to try and improve it's resale value. Now, I really think this practise is crazy... why, because I never get to listen to the music on the LP,or enjoy it for what it was meant to be; the next 'investor' never gets to do the same ( if he supposedly wants to keep his investment) and so the piece sits on the shelf collecting dust for who to finally enjoy?
Are you keeping sealed LP's for the next investor?