There is nothing wrong in being prosperous as long as you are seeking a Heavenly crown instead of earthly gain.
Mat 6:31 Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed?
Mat 6:32 For after all these things do the Gentiles seek for your heavenly Father knoweth that ye have need of all these things.
Mat 6:33 But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.
Mark 8:35 For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the gospel's, the same shall save it.
Mark 8:36 For what shall it profit a man, if he shall gain the whole world, and lose his own soul?
Mark 8:37 Or what shall a man give in exchange for his soul?
Mark 8:38 Whosoever therefore shall be ashamed of me and of my words in this adulterous and sinful generation; of him also shall the Son of man be ashamed, when he cometh in the glory of his Father with the holy angels.