In Korean tradition, dreaming of a thief is read as mixed. It is most often tied to 재물, 전반.
Being robbed was often read in reverse — wealth arriving; catching a thief, recovering what was lost. Being threatened by a robber, a real threat to guard against.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream