Could you please elaborate on what is considered to be the ultimate goal or aspiration in the realm of cryptocurrency? Is it the quest for a universally accepted digital currency that offers anonymity, security, and scalability? Or is it the pursuit of a decentralized financial system that empowers individuals and eliminates the need for intermediaries? Furthermore, how does the concept of the holy grail in cryptocurrency relate to the ongoing development and innovation within the industry? And finally, are there any specific projects or technologies that are currently being hailed as potential candidates for this elusive grail?