There is no such news like that. And i don't think google will ban ico and crypto ads. Because google is earning big money in this ads. So that they will not ban it.
Thats very true, google's main income is from advertising and if they do banning only on crypto ads I think they make a big mistake, besides some times I had time to find ads about crypto or ICO, but mostly ico on google, website, or youtube. so google not ban crypto ads