I have a couple Ring cameras and get notices when someone gets near the house. I also have a SimpliSafe basic system that I have not gotten around to installing yet. I look at alarm systems like this - If I'm not home, I want something to notify me so that I don't walk in on someone. If I'm home, I want to know it asap and be sure. I thought the Ring cameras would work for that, but the notification alert doesn't usually wake me up at night, plus, it's usually an animal. That's why I bought the SimpliSafe. It has door sensors and a loud alarm that will alert me at night if the door is breached. The loud alarm also, imho, benefits me if I'm not home as I believe it will cause the thief to grab and go, not knowing how long they have before the police are called.
Personally, I don't think you're very likely to prevent a break in. I think the best you can do is minimize the chance that you'll be confronted and most of all confronted without any advance warning. As pb4usi mentioned, it would hurt to have my things stolen, but in terms of financial value, it really wouldn't add up to much or matter.