In some markets that will be true but then again it depends on when you purchased the property. Some of mine were purchased in the 60s & 70s. I would not sell my home here for to many reasons to list.
I built it in 91 to retire in but changed my mind.
My son bought two houses in Glendora, Ca this year, what do you think of that?
Points taken. It'll be the Johnny-come-latelys that will feel the big heat (as is always the case).
As long as those rental properties make you money (and don't cause you to tear your hair out every time some dome mick tenant confuses the kitchen with the bathroom), they're a good investment.
As for your home, again, I can't argue. It's hard enough to find a good one without worrying whether it'll remain a cash cow. The idiots that see their home as a cash cow are the ones that'll be jammed.