What is the most valuable unicorn?

Can you tell me what is the most valuable unicorn in the cryptocurrency and finance world? Are we referring to a company that has achieved immense growth and valuation, yet still remains privately held? If so, what specific criteria do you use to determine which unicorn holds the greatest value? Is it based on their current funding, revenue streams, market share, or something else entirely? And, what impact do these unicorns have on the broader cryptocurrency and finance landscape?