My Space Grants Me Immortality. If I Keep Hiding Until I Die, I’ll Be King!

A Pocket Dimension and a World Tree

Ranching.

From Ancient Times to the Modern Day

Stories about someone who has lived for thousands of years.

An Immortal Protected by the State

Any Modern Urban Immortality Novels?

I'm looking for stories set in modern society, not fantasy worlds. Ideally, something slice-of-life, like visiting old friends every day. I feel like a lot of immortality stories make their protagonists act out of character. They're so old, yet they behave like children and have no gravitas at all.

Looking for a Story About an Immortal Who Lives Forever and Wanders the Mortal World in the Guise of an Old Man

Looking for books similar to Daoist Supreme: The Ten Thousand Ghosts Subdued. Are there stories about pursuing immortality and wandering freely through the mortal world in the guise of an old man?