For me it’s quite simple. VERY simple. Too simple?
I just can't get enough satisfaction from just owning something that others badly want but can't easily get.
In this case for my happiness I would always need others who admire or envy me. And if they wouldn’t do that (anymore), then my joy would diminish?
This kind of collecting would be rather sad, wouldn't it?
And so for me it is the easiest strategy to get the most satisfaction and happiness to neglect all the (often artificial) hypes around us and simply acquire what you really like yourself. At least if you are a passionate collector and not (just) chasing the approval and / or money (😎) of others.