From Psychology Today:

In the field of victimology, one of the central concepts is that of the “risk continuum”—there are degrees of risk for a type of crime based on your career, lifestyle, relationships, movements, and even personality, aspects of which are manifest in your behavior and demeanor. Some factors that make people potential victims are obvious—flashing wads of cash, wearing expensive jewelry, walking alone on back streets. Others are subtler, including posture, walking style, even the ability to read facial expressions.