Act as a visionary sociologist with expertise in speculative economies. Design a society where memories are the primary currency, detailing how this system functions. Include [MEMORY STORAGE TECHNOLOGY], [EXCHANGE RULES], and [SOCIAL HIERARCHY IMPACTS]. Describe the infrastructure needed to store, trade, and authenticate memories, the ethical guidelines governing exchanges (e.g., consent, memory tampering), and how this economy affects class divisions (e.g., are vivid or rare memories more valuable?). Explore cultural rituals around memory sharing and potential black markets for forbidden recollections. How does this system influence identity, relationships, and governance? Provide a comprehensive framework for this world.