Who is bigger than unicorn?

I'm curious, when we talk about companies and their valuations, what exactly do we mean by "unicorn"? And more importantly, is there anything or anyone that can be considered "bigger" than a unicorn in the world of finance and cryptocurrency? After all, unicorns are startups that have achieved a valuation of over $1 billion, which is already quite impressive. But are there entities that surpass even this threshold? Could it be another type of company, a specific investment fund, or perhaps even a cryptocurrency project that has reached unprecedented heights in terms of market capitalization? I'd love to hear your thoughts on this intriguing question.