For you know the grace of our Lord Jesus Christ, that though he was rich, yet for your sake he became poor, so that you by his poverty might become rich. (2 Corinthians 8:9)
in order to take on human flesh and dwell among sinful people and the filth of this world, Jesus had to set aside the wealth of heaven. This was Paul’s teaching in Philippians 2:7
Jesus was not rich as to the things of men. But he was rich as to the things of God. Like the earth itself and creature is His. He owns the earth and the creature So it is belittling to say he is rich as to earthly things, he doesn't need it. It will be a distraction to His mission. He is God of both the poor and the rich. If he takes the form of a rich man His reputation will be too high that the poor will not hear him. So He choose to take the form of a humble poor person without reputation so the poor, the republicans and the sinners can hear him and be saved.
Luke 15:1
Jesus is beyond earthly riches He can not be regarded as rich or poor even though he chose to appear as poor. He is neither poor or rich as to the things of this world .He is God. He is beyond both.
Jesus Christ is not against wealth he is against pride and setting your heart upon wealth above heavenly treasures. Have riches but be content with what you need and give out the rest to help the needy. Wealth is good for helping not for oppressing the poor and needy.
During his earthly ministry right from His birth to His death he manifested humility. He had a humble birth and lived a humble life. He is not rich though rich yet He never possess any earthly wealth. 