How is Walmart a bigger fool incase of flipkart, they wanted to gain an entry into Indian ecom and prevent Amazon to capture the entire market.
They could have and it would have taken years to build a brandname or they could buy an established player and get the brandname from day one. Walmart went with the other option.
That is how big companies operate, nothing to do with India.
Is Google a fool to buy youtube when they had Google Video?
I could be wrong. With the absurd amounts of QE that went on for so long, maybe valuations that price in earnings decades away are justifiable.
2. Big companies often fail in new and unfamiliar markets.
3. Consider acquisition price inflation. If YouTube was created in this period, its selling price would be near $20B just like WhatsApp.