A Unicorn means a mythical animal typically represented as a horse with a single straight horn projecting from its forehead. The animal is yet a myth. But ‘Unicorn’ suddenly rings a bell in India. Unicorns are private companies valued at $1 billion plus. The mythical rise of billion dollar start-ups has caught the imagination of one and all. Last month the Prime Minister unleashed his Start-up campaign. This has put Unicorns under spot light. Obviously they have become a subject of envy. To their credit, Unicorns have made the top grade without any pedigree and are deserving of the attention. There is brewing excitement over talk of Unicorns scaling up to be Decacorns (10 billion plus valuation). Good so long as it lasts. Endurance is the key challenge. Also, valuations too need evaluation. Simply because business isn’t always a zero sum game.