Doesn't that imply that ownership doesn't and can't exist?

What do you own that cannot be taken by force in some way or another?

Some non-physical stuff like happiness or sadness, maybe, except that if you were killed you wouldn't have those either.

It’s not a universal or god-given right. It’s a privilege granted to us by the state we reside in. People sacrificed their lives so that we could enjoy this benefit.

Therefore, when I encounter individuals in my generation who haven’t participated in any wars and assert that they own their land, not the state, I can’t help but believe they require a reality check.

For the N years between now and the neighbor country conquering, the title is worth the value I can get from the legal rights it gives me within the legal system of my country. That's more than zero, even if it doesn't last forever.

You can bet on a price but it’s not yours. Unless the state defends it and agrees that the piece of paper you call title is binding.

To the conqueror your paper means nothing.