This article shows you how to change the icon of any file or folder on your Mac. ... BMW, Hyundai, Kia, Genesis, Mercedes-Benz, Volvo, and a handful of others, and it is set to expand further.

That's why your Home folder and Trash—both folders—have their own special icons. You could pay $30 for the privilege of easily changing icons, or you could do it for free, no app required.