5. Overconfidence. It's isn't always sketchy salesmen and journeyman grifters who
should draw the lion's share of your attention. In some cases, a family can be its own worst enemy. For example, leaving the doors open to your house on a bright summer's day while you head to the store might seem harmless enough. However, if a thief happens to be walking by, he can identify and act on these minor slips in a flash. Thievery is all about opportunism.