I host it to have my own data under my own roof.
- Nextcloud (everything from pictures, over tax stuff to my keepass database)
- Matrix server (even more important with every government on this planet pushing against encrypted messengers)
- PiHole, that i can also use via DoH from my phone
- Traccar instance to keep an eye on my car, when it's in for service / maintenance / when i'm abroad
- ...
I've worked in the hosting industry. I've witnessed an internal breach, where an employee abused access over a few corners and fetched files matching a certain pattern from all customer VPSes (Virtuozzo container based VPSes have their root filesystem accessible from the host)
What is your worst case, if someone gains access to your stuff? We can't answer that. That doesn't necessarily depend on your applications, but more in the data behind them.
Can be everything. From nothing to financial ruin through identity theft.