Starting in June of this year, you will no longer be able to click on Google-served cryptocurrency get rich quick advertisements. Of course Google is waiting for the crypto-bubble to burst before it pulls those ads. If you are not familiar with just how many there are, this guy lists out more than a few that he thinks are ponzi schemes.
In addition, ads for the following will no longer be allowed to serve: Cryptocurrencies and related content (including but not limited to initial coin offerings, cryptocurrency exchanges, cryptocurrency wallets, and cryptocurrency trading advice)
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Source: [H]ardOCP – Google Bans Crypto Ads