Wanted to learn about amulet and allah's power?

I heard that hanging an amulet (tabiz) around the neck is considered shirk. My first question is: can you hang an amulet that contains a verse from the Qur’an? If a person wears an amulet, they believe that Allah will heal them through the amulet — the amulet is their means. My elder brother says this is wrong: Allah does not need any means to cure an illness. So when I am in trouble, if I ever need money, Allah gives it to me through people. Why, then, is there a need for a means in this case?