Dreaming of a ferret means your life is full on untrustworthy friends and acquaintances that make your life a living hell. You must be constantly looking over your shoulders to prevent sabotages. This keeps you up and contributes to the many restless nights.
Dreaming about seeing a ferret coming out of a hole could symbolize the person feeling they have been betrayed by someone close to them or feeling like they have been tricked into doing something they did not consent to do.
In the waking hours, disassociate yourself with these people and only keep company with people you trust.