Not sure on the authenticity of the article. But I don't think there will be a ban on crypto-related ads google has nothing to gain from that. At the same time regarding ICO ads I would understand there being some talk about it as google might feel responsible for promoting scam ICOs and might be adding extra filters into what ADs are considered ok. As for an whole ban on crypto content. I don't think thats going to happen, correct me if I'm wrong.