There's nothing wrong with having aspirations but I think this hustle culture and getting rich quick mentality a lot of people have are setting themselves up for a life of misery and depression, especially if your aim is to become a millionaire with a mansion and flashy car as 99% of people aren't ever going to achieve this.
And it never ends because this is how the world is built. There's always somebody richer than you and there's always something more expensive to buy.
A poor guy will dream of his own house and a car and if he ever gets rich a heated swimming pool in the garden and a garage with 1 car for each member of the family.
When he gets it his standards will change and he'll think a rich person owns a 10 bedroom mansion and has a private cook and the garage is full of cars because he needs an RV, a town car, a sports car, one for every kid...
When that's accomplished he still won't be satisfied because rich sudenly will mean owning a garage full of exotic cars and houses in different parts of the world.
When he get's that he'll want a helicopter, a yacht, his own sky scraper... When he gets that it will be a career in politics. It never ends!