“For he (the wicked) is cast into a net by his own feet, and he walks into a snare” –Job18:8
Job’s friends may have had good intention on the first place when they sat in silence with Job and after seven days had counseled him. But when Job responded and told them his arguments against their case, they become hostile and accused Job of being a sinner and wicked, they were angry at job and had cited various reason why they believe Job deserved his sufferings. Though slightly biased there are still some truths behind their words and some are not.
One of the arguments they have had given that is true is the one where they told Job that wicked people, those who sinned and angered God, are deem for self destruction. That sooner or later their lives will be gone, their passion will no longer burn, their source of income will goes out, their own schemes will be their downfall and their own ways will trap them to destruction (v.5-10).