Shortage of something, or a desire to avoid or compensate for one.
Preparedness (or lack of it) for the future.
Procrastination or postponing, as in “letting things stack up” while delaying action.
Letting things pile up emotionally (such as grudges, blame, or judgments) by not working through them.
Hoarding or keeping things for yourself (such as money) or to yourself (such as secrets).
See also: Increasing, Many, Group, Storage, Shelf, Container, Finances, Money [1]
If it is about collecting objects, the episode might predict scarcity. [2]