Everyone should understand that there is a clear difference between being rich and being wealthy. Someone can be rich for one day and return back to bring poor just after that day. Yea, you can think about people who win very huge amounts through gambling. For the few days that money will be available, the fortunate person can be said to be rich. His purchasing power increases, he can buy a car and what ever he wants during those periods. Once he exhausts his money, he goes broke again.
There is more to being wealthy. Wealth involves assets and generational flow of income. Wealthy people have assets generating money while rich people work their ass out to make that money.
A good number of people we see around us stressing to make money are working towards being rich. Only the smart ones invest alot so they don't have to stress that much to make money. Being wealthy is freedom.