So let's say introverted people? They can't talk much face-to-face, but online they can talk a lot. Though I haven't experienced this kind of meet-up, for sure most of us are shy at first because even though we know each other online, face-to-face is different, but still, there are people who want to meet up physically, and there are also people who want to meet up online. Whatever the reason, the goal is the same: to discuss bitcoin, have fun, and also the plans of oneself about bitcoin.
As an introvert I can say that I can talk face-to-face a lot, I just need to have a rest a lot after.
So no I mean you think about what you talk more if you see someone in front of you: anyone can follow you if they'll think something wrong and criminals can visit bitcoin meetings purposefully.
This not only happens when you own bitcoin, if you have a lot of money and brag, you will also still be attacked by robbers. In this case, I find bitcoin more secure, I don't think the robbers know about bitcoin. They are addicts, I don't believe they take the trouble to update technology news daily to serve their theft. The area I live in has never heard of any bitcoin-related robbery, what they need is cash, phone, gold...I also don't like talking about bitcoin in public, simply because I like it private.
Yes, problems happen not with bitcoin holders only, but there are several things why we should be at least not less cautious: first bitcoin transactions are irrevocable so criminals expect we won't return anything; second criminals expect we will have problems with proving that we owned those assets they steal and so they expect that in less cases bitcoin holder will visit police. So IMO we should be more cautious then by default.