^^^ But that's the point. You can't easily steal someone else's bitcoins, even if you shoot the guy dead.

In Bitcoin meetings, nobody has to tell anybody about the intricate details of how many bitcoins they have. All they would be doing is one-on-one discussing about bitcoin strategies, and general strategies for financial planning. Church meetings do similar things, without people always being forced to divulge the intricacies of their family life (their bitcoin passwords).