Previously, Google banned crypto ads. As time went on, Google no longer banned that. And that means Google supports cryptocurrencies going forward. So I think this is a good thing for future crypto development.
The fact that Google no longer bans crypto ads does not mean they are accepting it.
Google is making loads of money from the ad revenue being generated with crypto so they have no problems with that. Also, the government of US is no longer hitting hard on crypto like before. That too, contributed to why Google allows crypto ads