Why would any company, however large throw away 10 billion from their bottom line to simply crash bitcoin, id like to see them justify that to shareholders! ouch 
even if it was technically feasible, which im not convinced of. Companies like google are too busy looking at making profits out of new technologies like driverless cars etc..
even if it was technically feasible, which im not convinced of. Companies like google are too busy looking at making profits out of new technologies like driverless cars etc..
Scenario -
World Bank: "Oh hey Google, listen, we need your help - please take 5 of your most skilled guys and setup this bitcoin farm for us, we'll give you 10 billion which we obviously have. Thanks!"
Google: "Sure, would you like fries with that?"
It's that easy. Bitcoin (and all other cryptocurrencies) is against some major interests.