So we have badges for stockpiling currants. I think we should have badges for stocking iMG. Maybe like 5003, 50,003 and 500,003? Feels like a natural step to me.
We don't have badges, but we do have leveling. If you're talking about iMG on hand, I think the game tries to encourage us to USE our iMG, not hoard it.
Of course at a certain point one runs out of new things to spend it on (except tickets and an ever-bigger energy tank), but hopefully that won't always be true.