The scriptures say- "Don't store up treasures here on earth, where they can be eaten by moths and get rusty, and where thieves break in and steal. Store your treasures in heaven, where they will never become moth-eaten or rusty and where they will be safe from theives. Wherever your treasure is, there your heart and thoughts will also be." - Jesus (Mathew 6.19)
Jesus made it clear that living for personal gain will only lead to great anxiety. Materialism and anxiety are two enemies of spiritual growth. We need to realize that the essence of life is not found in the possessions of things and that worry about the future is never helpful. By ourselves we have little power to change the future, so we must trust God to take care of us. And God does promise to provide for our needs, for he loves us and gives his children good gifts. Therefore, those who learn to trust God have no need to worry.