Sure, here are a few things on my mind now:
- Practical use cases for crypto/blockchain. I don't believe in the speculative financial assets that came out of it, but I am intrigued by the idea of a central bank digital currency for example.
- How to make some side income while having a full-time dev role in London.
- General startup ideas chat with people who aren't too attached to one particular view.
LinkedIn might not be the best place for that... even Hacker News is a better platform for that I think.
If you want to find friends (not just potential business associates), I suggest trying to find some other personal interest of yours that isn't money-related. Perhaps sharing on a different platform as well.