Our site is www.totalcryptos.com Google was great to promote our app at first, and admob too - but since the ban we've had to look for alternatives. If you'd like some help setting up a campaign on some of these alt networks we can help. www.bloc10.com
The first day we put no limit and they ate up our budget in 48hours it was really crazy. But the support is good, and the big upside the traffic on the alt nets is 99% crypto! So the traffic is more targeted. We have some legacy SEO clients from before Blockchain they spend big bucks on Adwords and get sometimes very little. So Adsense / Adwords can be tricky.
Just remember that Google built an empire out of it! Good luck, let us know if we can help.
They're not the only ones, Facebook did it too: https://www.nytimes.com/2018/03/14/technology/google-bitcoin-advertising.html
It would be nice if they provided a reason as to why they are banning crypto-related sites, instead of just changing their policies and shrugging their shoulders.