Sounds like Charlie Brown talking to Pigpen in A Charlie Brown Christmas.

"Don't think of it as dust. Think of it as maybe the soil of some great past civilization. Maybe the soil of ancient Babylon. It staggers the imagination. You may be carrying soil that was trod upon by Solomon, or even Nebuchadnezzar."

I wonder if by diffusion alone its been enough time that touching Elvis breath atoms is a certainty within a year?

You probably breathe atoms from Elvis in every single breath you take.

https://futurism.com/estimating-how-many-molecules-you-breat...

Nit: I believe Elvis was buried, and not that long ago, so the likelihood that enough of him has decayed into atmosphere for you to be breathing him at even 1 molecule per breath is very low.

If you start with the same premise as your linked article, and say how much breath you share with Elvis's last breath, then you can probably assume an atmospheric distribution close enough to the Cesar one in the article.

The percentages weigh in favor of dinosaur poopoo coffee.