Ορισμός και Σημασία του "(as|) safe as houses"

What is the origin of the idiom "safe as houses" and when to use it?

The idiom "safe as houses" has uncertain origins but is believed to have developed from the perception that houses are stable, secure, and reliable structures, symbolizing safety and protection. In its modern usage, it is used to describe something or someone that is extremely safe and secure, often emphasizing a high level of confidence in the safety of a situation or investment.