면 어쩌려고

what are you going to do if…?

→ 이다
phrase Rare #32,624
what are you going to do if…? Used to express concern or warn someone about the consequences of an action. The part before 면 describes the action or situation.
KO: 그렇게 돈을 다 쓰면 어쩌려고?
EN: What are you going to do if you spend all your money?