Personal finance. It’s something well covered elsewhere, but I’m passionate about it, and that passion is what helps a community begin and thrive.
I question what problems & losses that there would be by not having a community of some time. If you have just one person who knows everything, and there isn’t any motivation to change that, or suitable means to allow them to share their knowledge, then how do you cope if anything happens to them? Give them a way to let people ask questions, share what they know, and work together, and the company & community benefit.
What’s the worst that can happen by being involved? As not being involved means people can miss out on being involved with something greater, that benefits them, their peers, and their company.
I ran a group activity where everyone in the community wrote a sticky note on a topic they would be interested in either learning about, or sharing. Once all the topics were written out, I placed them on a wall in a line. I then asked everyone to put their name above it if they had knowledge on the topic they would share, and below if they wanted to learn about it. It showed not only what topics were of interest, but also how much interest there is.