Qatar is rich, their economy sustainable for many years to come, and literally they are living the American Dream. (in this case, the Qatari Dream). They invest, they think long term, or as you say they seek attention.

Now, you ask why, they show off? Because they can.

So if you are not a Qatari living the American dream, move over. Cause you simply dont have the chance for the showdown.

:P