Is Tac Nyan a girl?

Excuse me, but could you please clarify something for me? In the context of your question, "Is Tac Nyan a girl?", I'm curious as to where this name "Tac Nyan" originates from. Is it a character from a game, a book, or perhaps a celebrity in the crypto or finance world that I'm not familiar with? Without this context, it's difficult for me to definitively answer your question. Could you provide some more information about who or what "Tac Nyan" is?