I like to own some pins but like scrapping says wearing a landyard is a huge burden and pins could be easy to lose. I may occasionally put one on my fanny pack or something like that, but mostly i just have one in my pocket i may consider swapping.
I just display them on the lanyards hung over my dresser and take them down and stare at them from time to time lol.
In our family as kids (or an adult) grew up they would get a ride pin if they went on a more thrilling ride for the first time. And i love to get one for new resorts i stay at. Also like first time at an event pin,like christmas party, or like when we went on the 4th muppet pin.
Kids had/have special collections and usually now just stick a swapper or two in their pocket as they search for their missing piece.