I had a bike stolen years back. A Peugeot UO-8 fixie conversion. I foolishly left it outside the door at my job assuming most people would be uncomfortable on a fixed fear with cages. I was wrong.
i went through all the usual outlets. Notified the police. Posted online. Told the local shops. As luck would have it, several months later I found it leaning against a tree and took it back. Now my bike stays inside. My girlfriend doesn't love the idea of a dirty bike in the apartment but she understands these things.
In an old apartment I built a wall hanger for it and it hung above my couch. There are some space saving methods out there.
Sorry about your bike. Good luck .