There are some really involved plans that can get made with multisigs. Here's a scenario/an idea for a movie:

Imagine if you have two estranged sons who don't get along. You havent been able to get them to talk in decades. You create a multisig and hide it in bank safe deposit boxes in towns that are significant to the sons by being places that they had wonderful memories of getting along when they were younger. They have to work together to obtain the keys to get the inheritance and remember how important they are to eachother. You pass along your bitcoin and achieve your dying wish.