You're talking about a slice of a slice of a slice of a slice of the pie chart here.

First, how many people have downloaded @Bitchat in North America?

Of that small slice of people, how many are actively looking at Bitchat at the same time that you happen to be looking at Bitchat?

Of that much smaller slice of people, how many are within 50-100 meters of your present location?

Bitchat is most useful in places with high population density as far as I can tell.

I think there's a way to use it with internet to talk to more people but if you're just using bluetooth, then yeah, you're not gonna find anyone to talk to most likely unless you're at a Bitcoin meetup or a Bitcoin conference.