The Preacher shows how dangerous it is to live for wealth, to make getting rich and staying rich the goal of your life. Once you have set your heart on wealth, you only want to become richer and richer. You will no longer be satisfied with anything. We read about this in 1 Timothy 6:9, “But those who desire to be rich fall into temptation, into a snare, into many senseless and harmful desires that plunge people into ruin and destruction.”
10 He who loves money will not be satisfied with money, nor he who loves wealth with his income; this also is vanity.