You already possess everything nice there is to have in the world; other people are simply storing these things for you–at no cost. If you want a Porsche, you can simply have one brought to you at any time, and it’s the same with any other material possession.
When you purchase something, you’re participating in an illusion of power and ownership, as there are many more things you do not have still, and even those you do “have” will be returned to the world as soon as you die.
As such, all things in the world are simultaneously yours as well as not yours, since you can have them whenever you want, yet when you die you will leave with none of them.
Things are transient. Think not of them. ::