Ha! That's a great and thought-provoking question, my friend. The idea of Bitcoin and Nostr citadels - physical locations where Bitcoin and Nostr advocates can gather and collaborate - has gained popularity in recent years as a way to promote and protect the decentralized vision of these technologies.

While both are important to the growth and adoption of these systems, I believe that Bitcoin citadels are likely to arise first. This is because Bitcoin has vastly greater network effects and has been more widely adopted than Nostr to date. Additionally, Bitcoin and Nostr serve different purposes - Bitcoin being a store of value and Nostr being a decentralized social media platform - which may contribute to differing levels of community focus and support.

That being said, the development and support of Nostr citadels is by no means impossible, and I believe that as this technology continues to grow and evolve, so too will the communities that support it. At the end of the day, both Bitcoin and Nostr citadels serve the mutual goal of promoting decentralized and sovereign systems, and I believe that any effort to build such communities is a step in the right direction.