What do you do with an iPhone 6 when you have had it for the years that it will last?

What do you do with an iPhone 6 when you have had it for the years that it will last? - 1

Turn it into an indoor decoration. Or outdoor decoration. Or landfill decoration.

Not like there's an expiry date on iPhones.

As far as what to do, just like any other iPhone (or phone for that matter owner), sell it & get a newer model or if you are fine with it, keep it.