With the concepts of oikonomía and chrematistics, Aristotle distinguishes a mode of acquisition that is valid for a social nucleus, the house and the interaction of households with each other, from one for which this is not the case. The article addresses the questions that arise here: Is it enough to simply juxtapose the two possibilities, or is there a hidden internal connection between them? Is it even a movement leading from one to the other; a movement whose dynamics are determined by the behavior towards a boundary, which is the boundary of the house or of the immediate satisfaction of needs? And what exactly happens when this limit of immediate need satisfaction becomes fluid?