> USD is weak money, and TikTok is abusive and censorious.

LOL. you think normies care? They don't. Just like they don't care about privacy and censorship. Normies want safe and fun. 

>  If twitter isn’t better than mastodon, why does it have more users?

Mastodon or Nostr does not need to appeal to a broad audience or dominate the market.  In fact, it's better that way. Small and Niche like Mastodon's size should be Nostr's goal. Over 1 million daily active users. Growing to Twitter's size would make it difficult to even host Nostr relays in your home