If you create your account on the #nostr network, you'll always own and control it because your account is a public/private encryption key, and not owned by a federated server administrator or anyone else. Just don't lose or ever share your private key with anyone.

The #nostr network is bridged to the #fediverse which is how you can see this post that I've done using the #Amethest mobile app and nostr.

By doing this, it's your nostr account that's keeping a record of all your posts, followers and following, history, etc. You'll keep them forever. No one can ever take them, seize them, lose them because a server crashed, or just deletes them for fun.

True freedom is personally owning your own account data. Only #nostr has that benefit.