The gov or mainstream media is the barrier.
They talk about Nostr, everyone will do their own research and testing.
Discussion
I'm the only one who uses Nostr and most of the people around me don't know about bitcoin yet.
I got 6 friends already orange-pilled. But not yet with Nostr. So, i still need to give them time to stack sats relentlessly first before Nostr. Let them get used to it.
Bringing friends to Nostr is one of the very best things to do. If I brought them in, I wouldn't really want them to know my ID because I would feel less free to talk.