Simply because God allows something to have something, does not mean it is a blessing - a reward for pleasing Him. The unsaved often have much prosperity, but are in no ways blessed by God. There is no such thing as a blessed unsaved person. No such thing. Such is blasphemy to say that an unbeliever can be blessed by God. How can God give a reward to a person who evil and wicked? How can He?
You may argue, doesn't He give undeserving sinners salvation, who are wicked? Such is a deceptive and blasphemous question asked by Christians who are either too naive to understand why God does not nor cannot bless the unsaved, or have a fear of people, such that they dare not think that the unsaved people cannot be blessed.
The blessings of God is different thing from His grace. God does give some 'common grace' (an insulting term used by modern evangelicals, by making it called "common"). For he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust (Matthew 5:45).