Here's a definition of "prosperity gospel".
Prosperity theology (sometimes referred to as the prosperity gospel, the health and wealth gospel, or the gospel of success) is a religious belief among some Christians, who hold that financial blessing and physical well-being are always the will of God for them, and that faith, positive speech, and donations to religious causes will increase one's material wealth. Prosperity theology views the Bible as a contract between God and humans: if humans have faith in God, he will deliver security and prosperity.
The Bible is quite clear what to do with your possessions.
And, behold, one came and said unto him, Good Master, what good thing shall I do, that I may have eternal life? And he said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments. He saith unto him, Which? Jesus said, Thou shalt do no murder, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness, Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself. The young man saith unto him, All these things have I kept from my youth up: what lack I yet? Jesus said unto him, If thou wilt be perfect, go and sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come and follow me. But when the young man heard that saying, he went away sorrowful: for he had great possessions.
- Matthew 19:16-22 (KJV)
Materalism is a way for satan to lead you astray.
For the love of money is the root of all evil: which while some coveted after, they have erred from the faith, and pierced themselves through with many sorrows.
- 1 Timothy 6:10 (KJV)
When we are obedient to God's Laws God will bless us, but God doesn't give as the world gives.
Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid.
- John 14:27 (KJV)
Don't be misled by the prosperity gospel. It will lead you astray.
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
- Matthew 6:24 (KJV)