what does it mean when you live at the crosspoint of time and space ?

You make a mistake to view it as a crosspoint in the first place (at least by most definitions). Time and space are both coordinates in spacetime. Every single particle in your body, down to the Planck scale (which is MUCH smaller than even a proton) have things effecting them from both dimensions to a significant degree.

Decoherence already involves a ridiculous amount of interactions. Quite literally an infinite number by the time it reaches any scale remotely comprehensible by humans. We're already a very, very long ways down a chosen path.

Whether you want to anthropomorphize such a fact is up to you. Personally, I subscribe to existentialism: Existence precedes meaning. We exist. Period. What you make of said existence comes down to what kind of universe you want to live in (and our massive universe has a lot of problems already).

It means you are standing at first and first, right outside famous ray's pizzeria

It means you are alive. Welcome to earth.