So even if you keep your own coins secure, there is still a danger of theft performed with violence. You have heard of people who were forced to give up their coins/keys under duress.
Does this mean that multisig is a must?
What good is a multi sig because you would obviously just give up the person or details to get the other half. If you're worried about violence then info could always be coerced out of you but this happening would be a rarity.