In 20 years of managing server fleets, I always had the pleasure of watching bots taking a dig at my server(s) the moment I give their public IPs and enable their interfaces.

For someone who knows what they are doing, it's more like mosquito noise, a mere nuisance, but even then, using a rock solid system with all updates installed carries the risk of having a zero-day.

If your server is networked to the rest of the house, and if somebody manages to get in, then it's all fun(!).