I see now, too bad, I was thinking those where all in parallel. Now I'm reconsidering going to the Riga Bitcoin conference, I was mostly excited to get both Bitcoin and nostr in one.
Maybe I will join the next one in Europe.
Maybe it will be in my country, Laustr, Bernstr, Nostrano (nostr-lugano). Or in France, even if I would be less excited about it but Nostrasbourg might be a good name.