If there's any spare land left where you're allowed to build and live, sure. In some countries there is. In some there isn't. Where I live, no chance, people

If there's any spare land left where you're allowed to build and live, sure. In some countries there is. In some there isn't. Where I live, no chance, people who have found unoccupied patches and built on them tend to eventually have their property destroyed by government. So maybe you're thinking, move countries. Nope. A lot of people in the world are prevented from moving to countries they'd like to move to. Heck, sometimes married couples are prevented from being together. It's a pretty restrictive world.