Thank you.

I've raised the same issue on Reddit and got roughly the same response: https://www.reddit.com/r/nostr/comments/1av6krh/people_to_follow/

Personally, practically anything other than Bitcoin. It's not just that I don't find money (as a topic) sufficiently interesting, but also that having one predominant topic hampers adoption.
That'd be true for any other topic, if it were the predominant one and to the same extent. A platform which is mostly about gardening, or mostly about Spiderman, or mostly about any other one topic would also fail to be an alternative to mainstream social media and would struggle to get widespread adoption.

I think mainstream platforms used to get this right, in the sense that they provided a feed most people were willing to waste their time on. Now it may no longer be the case to the same extent, but they have a large enough userbase and rely on the network effect. Nostr doesn't.