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They are private technology companies, born from an innovative idea and financed by various investment rounds. They have in common a valuation that exceeds 1 billion dollars. They are the so-called unicorns, which, according to the CB Insight census, today there are 728 worldwide and have a total value of 2 trillion dollars. Contrary to what one might expect, the first in the ranking is not a startup born in a US garage, but the Chinese one Bytedance, with registered office at …