If we take a step back and ask ourselves, "Why does nostr exist?" It exists so that people around the world can communicate free from the mediation and manipulation of a centralized exchange of ideas. It exists so that people can speak freely, regardless of their standing in society. It exists so that the weak can be strong, and their words can used as resistance.
Nostr will grow, when the world needs it. We do not need to do anything other than reinforce the battlements that make the above possible. We do not need to water down content. We do not need to silence the ideas of a "bitcoiner", or anyone else.
Yes the UI could be better. Yes searching content could be better. Maybe in the west these are concerns, but if you live in an area where everything you say can be used as retribution, I think you are much more willing to put in the work to figure things out.
It will grow, because it will be needed. Patience is required, and in the not too distant future we will watch the enemies of free speech do all the marketing needed to grow nostr.