If a person has food, clothing and shelter -- and is contented -- then that person is truly rich.
If it is a sin to have an abundance of possessions, then Abraham was a great sinner.
Gen 24:34 And he said, I am Abraham's servant.
Gen 24:35 And the LORD hath blessed my master greatly; and he is become great: and he hath given him flocks, and herds, and silver, and gold, and menservants, and maidservants, and camels, and asses.
The scriptures teach that it is lawful for us to have money and possessions; but we must not "love money" or be discontented. Many poor people are not thankful for what they have been given and are just as willing to defraud others as the covetous rich.