It is a status symbol the Veyron and Agera. A $100,000 corvette is a nice car, but it is still a middle class car. A $2,000,000 car is a rich man's car.
I have distant family that I personally consider to be worth quite a lot of money. They really don't have a lot of money, but compared to most people they do. They drive a trio of 2-8 year old Ford trucks that look like hell. They do not want to bring attention to themselves.
That same family isn't in the $2 million dollar car bracket, not sure what his net worth is. He sold an oil company for something like $30,000,000 about 10 years ago. Then they bought it back. For about $5,000,000. His son is about 45 and chipping away at killing one of everything on the planet chasing the Weatherby Award.
To most people they have an incredible amount of money.
They bought a ranch, and kind of disappeared like you should.
When you own a Veyron or Agera why do you own it. To show off, to be a big shot. So I would venture that most people that own those cars fall into 2 groups. Celebrities that make 4 or 5 million in one shot and buy the house in Malibu and this kind of car. Or asshole young surgeons who just want to show off and are burning through money like their is no tommorow.
The other group would be the super rich. People that are worth $300million and up that can afford to have private security companies full time, and everyone they know got one of these cars when they turned 18.