Wealth is a part of success.
Many people related wealth to evil for the wrong reasons: maybe they've met wealthy people they didn't like, or they link wealth with greed and selfishness.
But money, as a medium, is powerful. You can use it to buy security, to make yourself happy, to donate to a worthy cause, to start a useful business, and many other things.
Shameless plug
...
I wrote a post about this a while back, which you guys might enjoy, called
"How to 'buy' Happiness"
And here's an opposite and complementary one:
"18 non-monetary things you can do to be happy"