If you own a house, things are slightly different. There's a house involved. But your ownership of that house is probably written down in some database; in the US this often means there's a record of you buying the house?"your title?"in a filing cabinet in the basement of some county clerk's office. (It's not a very good database.) In many ways the important thing here is the house: You have a key to the front door; your stuff is there; your neighbors will be unsurprised to see you leaving the house in the morning and would be surprised to see someone else coming back in. But in many other ways the important thing is the entry in the database. A bank will want to make sure you have the title before giving you a mortgage; a buyer will want to do the proper procedures to that record before paying you for the house. The key will not suffice. Lots of other stuff. Much of modern life occurs online. It's not quite true that your social life and your career and your reputation