Obi Nwosu argues that running one Fedimint federation across three independent codebases advances Bitcoin custody resilience by reducing dependence on shared software. Nwosu writes that the Fedimint team demonstrated the federation at Ecash Hackday in Berlin, with Cashu's thesimplekid building one implementation. Calle separately unveiled Federated Cashu at bitcoin++, using a new blind signature scheme. Nwosu argues that Bitcoin custody needs independence across protocols, wallets, hardware, people and jurisdictions, rather than trustworthiness alone.