What race is the tau?

Excuse me, could you please clarify the origin and context of the term "tau" that you're referring to? As an expert in cryptocurrency and finance, I'm not immediately familiar with "tau" being used to describe a specific race. Is this a reference to a fictional universe or science fiction work? Or perhaps you're asking about a different field entirely? I'd appreciate it if you could provide more context so I can better understand your question and give an accurate response.