Firstly, in today's world, people are having more stress and long working hours compared to the pervious generation. Everybody wants to be rich and live luxurious life because this give them a high status in society and respect from people. People believe what they see and that makes the show off trend more in demand. For example, if a person drives an expensive car on the road and pass by you while you are walking on the footpath, by seeing him, it definitely gives his rich impression. Same as by seeing big villas or houses, it obviously convince us to think that people living in these houses are more valuable.
Secondly, people who are in high profile also makes us to believe that they are more important. Their outfits, their job status, their public appearance also shadow their worthiness. For example, CEO of a company will have more respect compare to the experienced manager of the same organisation. People attracts by the social status of the person.