Most of your physical security comes from two things: 1) the fact that the rest of us lock our doors, so most ne'er-do-wells have accepted the notion that clo

Most of your physical security comes from two things: 1) the fact that the rest of us lock our doors, so most ne'er-do-wells have accepted the notion that closed doors tend to be locked. It's a form of herd immunity that protects you so long as only a small number of people behave like you. 2) the shift from cash to electronic money, meaning that physical theft is less lucrative than it once was (and meaning that most money is protected by entities that invest meaningfully in security.) You're a free rider, benefiting from effort made by others, while being a (small) net negative to society. You're welcome for the security we've provided for you.