What do unicorns drop?

Excuse me, could you please clarify what you mean by "unicorns drop"? Are you referring to a metaphorical or figurative sense, or are you asking about a specific game or application where unicorns are characters and they drop items? In either case, it's not a common expression in the world of finance or cryptocurrency. Could you provide more context or explain what you're asking about specifically? It would help me give you a more accurate and relevant answer.