For the love of money is a root of all kinds of evil. Some people, eager for money, have wandered from the faith and pierced themselves with many griefs. (1 Timothy 6:10 NIV)
I have known many wealthy people, some have been happy, but many are not. Whether it is due to the incessant need to strive for even more or fears around their wealth or family problems generated by it.
Wealth, in and of itself, is not a bad thing.
It is what we do with it that can define us.