According to the announcement, published by Google, the Google Ads policy on Financial products and services will be updated in October 2018 to allow regulated cryptocurrency exchanges to advertise in the United States and Japan.
The announcement reads that advertisers will need to be certified with Google for the specific country in which their ads will serve. Advertisers will be able to apply for certification once the policy launches in October.
This policy will apply globally to all accounts that advertise these financial products.