If some people are extremely rich, it does not mean that they all are same. Each individual is different. Being frugal does not mean being cheap. It means that every amount of money is spent in the right direction, i.e. somewhere it is worth spending.
The rich people think about the present moment and the effect of it in the future, they are always trying to think ahead. There are many rich personalities who spend a lot of money but surprisingly, all the rich people have 5 frugal habits in common. Here you can observe each.