Home security is important whether in a home or an apartment. The best efforts of law enforcement to reduce crime will be of no avail without citizens doing their part to protect themselves and one another.
Believe it or not, most home burglaries are not committed by professionals who have planned for months to commit a specific crime. Rather, most are committed by opportunists who see an open window, a faulty lock or some other opportune situation. A large number of burglaries are classified as "no force", e.g. the burglar simply walked through an unlocked door or climbed in an open window.
While burglary is one of the most frequently committed crimes, it is also one of the most preventable. And the person who can prevent it is you!