According to the latest reported google will begin to prohibit cryptocurrencies and related content as it says in the lick https://goo.gl/hMDnMu the ban will start from June e of the current year, the ban will be given by the simple echo of that goole ad note a big drop in the number of ad impressions in your ads will not accept things related to (including, but not limited to initial currency offers, cryptointercambios, cryptobilleteras, and crypto-commercial advice) thus giving a great ban on the giant Searching sites as very well known in January this year facebook also banned this type of advertising.
The appointment that will be placed below is said by Scott Spencer, who is the director of sustainable development of google ads and revealed this news through CNBC on 03/14/2018
"We do not have a crystal ball to know what direction the future will take with cryptocurrencies, but we have seen enough harm to the consumer, or potential damage, which is an area that we want to address with extreme caution."