If you’re accused of a crime, you don’t have to take the witness stand so that the opposing lawyer can examine you. Exception #1: If you’re ever summoned to speak in front of a grand jury, you’d have to answer questions. Exception #2: If you’re in the military and the country’s at war.
The Fifth also says the government can’t take your stuff, put you in jail, or kill you without convicting you of a crime or (if it applies) compensating you.
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offence to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.