The world is material. The famous saying is "Being is truth". Since all beings exist, there are objective conditions and facts for their existence. Cats, dogs, etc.-including people-are just a name given by human beings to what they know.

Ghost is just a title for some mysterious things that can't be explained yet, but are objectively felt psychologically.

Like people, generally speaking, if you don't commit a crime, people won't commit a crime against you. But it does not rule out that some criminals attack others for no reason. So generally speaking, nothing will happen easily, but exceptions are not excluded.