Be not Highminded
The idolatry of money is warned against in 1 Timothy 6:10, where the Bible says: For the love of money is the root of all evil:
There are many people who serve the false-god of mammon by loving money more than they love God.
There is also high mindedness that can creep into someone's heart that has money.
1 Timothy 6:17 describes the charge that Paul gives Timothy regarding this.
Charge them that are rich in this world, that they be not highminded, nor trust in uncertain riches, but in the living God, who giveth us richly all things to enjoy;
This charge is to the church of the living God, to trust in the living God, not in uncertain riches.
It's as if God knew saved people with money would run the risk of thinking they are better than others. Imagine that!
The highminded Christian is prideful and arrogant. In their mind, they elevate themselves above others, seeing other people as beneath them. They will shout and amen when there is preaching against alcohol, drugs, laziness and other such sins. However, they squirm in their seat when their highminded pride gets preached against. They will get frustrated when they can't buy out or run out a preacher of such boldness.
The best thing a preacher can do is show rich people that they can use their wealth for God's glory.
After all, nowhere in the Bible do we see God forbidding someone from being rich. Instead, 1 Timothy 6:18 says...
That they do good, that they be rich in good works, ready to distribute, willing to communicate;
In other words, the God who gives us richly all things, wants us to use what we have for His honour and glory!