which is not opposed to you being on Bluesky or Instagram or LinkedIn or wherever.
If you don't want to get your own domain and run a server (not practical for most people) you can still protect yourself from being stuck in a single silo by broadcasting to many social media sites.
Imagine if Bluesky decides to ban you, and continues to ban accounts you create elsewhere. Atproto ensures non-Bluesky PDS can see you, but you've lost 99% of the userbase.
The other challenge that AP has as an ecosystem is that they have been hostile to anyone wanting to build an index or business. People need to eat and they turned off a lot of developers who'd love to make their living building social media tech outside of the corporate oligarchy.
ATProto welcomes all, even if there is the occasional drama or hostility.
The Wikipedia page says "Nostr is primarily popular with cryptocurrency users, primarily Bitcoin users."
That's not my crowd.
And since you mentioned primarily Bitcoin users those are the crypto folks that seem to be very against the idea of tokenizing everything.
From what I understand by posting something on Nostr you are posting signed events to a list of dumb relays. These events can be of many types and include hints of discoverability. There is no blockchain and no token and the thing they call zap is just a link to a lightning address that is up to the client to show.
Your account is your key pair so you are not at the whims of a power tripping administrator.
It seems like the perfect nesting ground for non corporate user content and pocket islands of communities. Nothing prevents someone from implementing a relay or community that bans any talk about Bitcoin or crypto. I for one would love to see closed content focused relays in Nostr.
But you are right back to the same UX issue that prevented crypto mass adoption, i.e. lose your keys, lose everything
Very few want to own that risk.