God is not against our prosperity as a Christian He only charge us not to trust in our earthly possessions. Here He said do not store up your treasures on earth where mot and insect can destroy them, He rather told us to store our treasures in heaven where there is no mot nor insect. He knew we need money to transact and make living but He is concern about how we earn money, how we store money and how we allocate our money. It is evil to make money by taking advantage of people who are made by God. It is wise to save and invest wealth but it is foolishness to store up wealth without purposeful allocation.