Google already has its own currency
It is called Google Pay, Google Play Credits...
It is not a cryptocurrency , neither uses blockchain tech or whatever. It is like a PayPal
http://Https://pay.Google.comBitcoin has a different proposal
It is not really a currency actually. It is a payment method or something like that. The author is asking what if it will have its own currency like bitcoin.
We all know that Google can do that(having their own cryptocurrency), knowing how famous it is and obviously successful nowadays. So if ever they will have, I am sure that will be a successful one, and I think many users will switch to it.