Crazy:
Adjective:Mentally deranged, esp. as manifested in a wild or aggressive way: "Stella went crazy and assaulted a visitor".
Noun:A mentally deranged person.
Synonyms:adjective. mad - insane - demented - daft - lunatic - nutty
noun. lunatic

People with bipolar are not mentally deranged except when psychotic and most people don't have psychosis. Insanity is not a clinical/medical term, it is a legal term. Crazy is a derogatory term use to insult people. You are not crazy, you may be mentally ill.