Google has begun to accept advertisements for Bitcoin, and Google lifted its ban on advertisements related to Bitcoin and other cryptocurrencies. Starting August 3, companies using Bitcoin and cryptocurrencies can once again advertise on the search giant and various websites that are part of its platform. The ban was implemented in March 2018 to comply with the new regulations of the Financial Crimes Enforcement Network of the United States (FinCEN).
Article Source: https://updateonbitcoin.com/google-lifted-the-ban-on-advertising-related-to-bitcoin/
At last google understand the importance of cryptocurrency specially bitcoin , now that they lifted the banning there will be more and more ads will comes out from the most use site in the world.Article Source: https://updateonbitcoin.com/google-lifted-the-ban-on-advertising-related-to-bitcoin/
Great news! I just hope they aren't going to allow scammers to post ads. 
this cannot be promised mate , because no one knows who are scammers or not even hackers cannot be found so lets check or believe at our own risks .