I think they're just rumors as of now. Correct me if I'm wrong.
First Facebook, now Google. I don't blame Google though. Those ICO and cryptocurrency are just either trash, scams, or shit ICOs. Remember those Binance, MyEtherWallet, etc phishing ads? Yep. People keep on clicking on those phishing link ads so Google has to do something about it, and here it is.
I think it is still a rumors and I hope it would not happen because google is one of the best way to promote and advertise crypotcurrency and bitcoin so that if they started to banned it many people will stop on investing or buying bitcoin. Google is one of a trusted site and some people use this as basis so that they could have background when they invest on any kind cryptocurrency.