As a long-time real estate investor, I agree with the comments concerning holding all of the property you possibly can on an indefinite basis.
Although we’re in our 50’s, we started investing in San Diego and elsewhere almost 30 years ago, and, although there have been ups and downs, we hung in there.
Like many real estate investors, we eventually want to be able to turn everything over to our kids, and, IMO, that is why much of the “trophy real-estate” in places like San Diego rarely goes on the market for anything other than a stratospheric price. Of course, there will always be a few exceptions.
In my circle of people who have lived here for many years, it has been handed down from one generation to the next, and I think that will continue here, and in many locations going forward.