What the Bible Says About being Rich

"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; That they do good, that they be rich in good works, ready to distribute, willing to communicate; Laying up in store for themselves a good foundation against the time to come, that they may lay hold on eternal life." 1 Timothy 6:17-19
Jesus showed the rich young ruler (Mark 10:17-31, Luke 18:18-23, Matthew 19:16-23) that what he really loved was his wealth, not the Lord. It is not the wealth that is the problem, but the misplaced priority, worshipping the idol of money or power instead of glorying in the Kingdom of God. Jesus said it was very hard for a rich man to be saved, He did not say it could not happen.
In the quotation above, Paul doesn't insist that the rich not be rich or that they even feel guilty about being rich. He points to their hearts; if their hearts are set on God and not on their wealth, then their money becomes a powerful tool for use by the Lord.