Showing-off is considered to be a respectable way of demonstrating that you are 'something' or 'somebody'.
Parading your possessions: mobile phone, 4 x 4 car, large house... (and perceived possessions: trophy wife, accessory children, designer dog) is quite normal in society.
Unfortunately, this need to show is a result of insecurity.

Status, prestige... do these things exist?Very Important Person... by whose standards?
Consider: a TV celebrity walks down the street, chin lifted; expecting autograph requests, praise, compliments and praise.
But who notices them?If you watched the TV program they were featured in and liked the individual, then you may notice them and care.
However, if you do not recognise the celebrity, then they are irrelevant to you. 
They are just another face in a vast sea of faces.