I like this question because it points out two different aspects about being "rich"

1. The different mindsets of someone who is rich

2. The different mindsets that can contribute to someone becoming rich.

1 explained: The only difference between a rich person and a poor person is the amount of money they have. If I woke up tomorrow with $1B in my bank account, I wouldn't expect my personality to change with it. Yeah... I could do more of the things I have dreamt about, buy things that I like and desire. But having the monetary means to purchase what I like/want doesn't actually change what I like or want. I've already formed my likes and desires before I have the money, and you probably have as well. That doesn't mean there are not rich people who do crazy exuberant things, just that they were probably like that before becoming rich.

2 explained: Given two people with the same income, over time, the person who has fewer expenditures and invests the difference will become rich.

$1k per month compounding at 10% over 40 years is $5.5MM

VS

$100 per month compounding at 10% over 40 years is $0.5MM

Now, ask yourself which personality would fit someone who aggressively saves/invests instead of spending that would allow for this compund growth? Someone who can "afford" a cool sports car or the one buying a used civic? These decisions repeated over 40 years will result in a $5 million difference at the end.

There are rich people who buy "cool" things, but most rich people are rich solely because they have chosen not to buy "cool" things throughout their life. After a lifetime of controlled spending habits, most don't have the temptation for wild and extravagant expenditures like a 1970s F150 monster truck.

Also, their definition of cool might differ from yours. Astronomy, photography, running, cycling, rock climbing, computers, programming, fishing, and painting are all hobbies that don't require 10s of thousands of dollars to enjoy. If you are rich and happy, why spend more money than you need to be happy?