IMO one of the best use cases is DNS records. Using a p2p blockchain means I don't need to make any external network calls to lookup addresses. It also means, t

IMO one of the best use cases is DNS records. Using a p2p blockchain means I don't need to make any external network calls to lookup addresses. It also means, that if I trust my local client hasn't been compromised then all address mappings are valid, as they required hard cryptography to set via a signed transaction that was accepted by the network.