is your website accepted as being crypto-related where you added the code for AdSense? you are more lucky to haave that account actually when everyone who wants to have are dying to get accepted.
Cointraffic and coinzilla are the most used crypto ad network by publishers or site owners running ads on their sites. Although this two have strict rules when accepting sites on their list, your site should have enough traffic well at least 30,000-50,000 visits per month, i'm not sure the numbers but higher is much better especially on coinzilla. Cointraffic minimum withdrawals is €25 for bitcoin, and €200 or 300 for bank transfer/wire, i just not so sure on coinzilla since the site i managed never got accepted there unlike cointraffic.
€25 looks easy to earn if you have that huge of visitors. 30k a month looks very hard for a blog to achieve unless you are as creative as those crypto news sites to have done it alone. the popular crypto news sites such as i can see are using adbutler.com it must be paying BTC too.