the reason to have property (also a tool, or social-technology to be slightly more precise), i.e. ownership over things is a byproduct of having a marketplace in which we can trade.

In this view, the marketplace (or trade, depending on your outlook) is THE WAY to come together and put all our skills together in order to co-create (con-struct) something much larger.

Alas, capitalism means that only a very few chosen elites (which are, by this point, mostly autonomous corporations) get to decide what we all work together to co-create. We as human individuals are only able to participate in this figurative "marketplace" (understood as a social-technology) as the part of merchandise, specifically as 'commodity'-style labor.