You also miss my point. Why does it have that value?

Because it can be exchanged for other things more to your liking that also have value.

If someone gave you 200 shares of IBM stock, would you throw it away because it was valueless?

No, you would give it to someone in exchange for $16,890 (at the current selling price) which in turn could be used to fix the bumper on your Volvo and that would seem to be a pretty good indication that it does indeed have value.

tanstaafl.