Cryptocurrency ad buyers first learned about Google's ban on ads promoting initial coin offerings (ICOs), wallets, and trading advice back in March.
source https://www.google.com/url?rct=j&sa=t&url=https://www.advertisemint.com/google-is-lifting-part-of-its-cryptocurrency-ad-ban/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNGC1VJo5D9eGtWXVUgr5Qoy1Dgx6A
