But I might need it later

If you're a gamer, you might have already recognized the title and what it is.
I find no easier way to describe it but to say it is a syndrome, a psychological block that occurs when you have something expendable of great value and power, where you never think it's the right time to use it, you might be wasting it 'cos you'd need it later and not have it.
Some examples could be a very powerful potion that grants some sort of immunity, or a very special weapon that only works for a limited amount of hits. A good example off the top of my head is the Master Ball in the Pokémon games, a ball that will capture any creature thrown at (I hope I'm right about this or I'll have a horde of pokémon fans after me), there's only one of these in the whole game.
Then you save the thing and save it enough that you beat the game and the Super Immunity Potion is still in your inventory untouched.

"But I might find an even better pokaman later!!" 

But I find it transcends the gaming universe into real life, sometimes, don't you?
Have you ever gotten a flask of perfume for Christmas only to have it sitting there on top of your drawers for ever, because you're thinking "I'll use that for special occasions", but you never do?

Waiting for the King of Belgium to pay a visit.

A bottle of really good wine that you're hoping to share with someone really special only to see it gather dust.

That free photo paper sample that you got when you purchased the last batch of printer paper... I'll print some nice photos with this! but I only got 2 sheets, I better wait for a REALLY good photo!

Well maybe that's just me and liking being prepared for eventualities. Some other people probably enjoy their game items, perfume and photo paper more readily.

Which one is you?