What is the fastest growing unicorn in the world?

Can you enlighten us on the identity of the world's fastest-growing unicorn company? I'm particularly curious about which sector or industry this unicorn belongs to, and what sets it apart from its competitors that has enabled it to achieve such rapid growth? Additionally, how has the recent global economic landscape and the surge in cryptocurrency popularity impacted this unicorn's growth trajectory? Lastly, what are the potential challenges and opportunities that lie ahead for this company as it continues to scale?