"…‘I own the silver, I own the gold.’ Decree of God-of-the-Angel-Armies…" Hagai 2:8, MSG italics and emphasis mine
Satan's ploy to keep believers poor is primarily aimed at frustrating God, everything else is a by product. How do you think God, the creator, owner and ruler of the universe, feels when His own children suffer in poverty and His Kingdom operates poorly and beggarly?
To keep us poor, satan uses two very simple strategies, ONE: Keep us ignorant (of God's will and principles to prosperity), TWO: Hook us into flaw belief (about God's will and attitude toward prosperity). . .only the truth that you know (understand and apply) will set you free.