It definitely started as mostly crypto bros, kinda like how lemmy was 100% tankies, but it's gotten better. Lots more human rights activists and scientists and even just regular people on there now. A lot of human rights/privacy activists/orgs are joining up to it after nostr got some promotion at their conferences. Ultimately your feed will be who you follow so luckily you're in control of that. The default settings for most nostr apps even include a filter to remove anything crypto, NSFW, and other controversial topics related.