There is no need for bitcoin rebranding. It already has a famous name which is strongly assosiated with crypto, blockchain, decentralization, privacy, security, etc. Furthermore, it would be difficult for the whole community to come to a consensus with a particular idea of rebranding because everyone would have their own view on it. This would only cause confusion and divide the community. Rebranding would not change the essence of bitcoin but would only lead to unnecessary disagreements.