I have a crypto blog using the blogger platform and it's connected to adsense. it doesn't matter if your blog approved for adsense policy, but not many visitors you get with the crypto blog category and very low income.
You have a crypto website that runs adsense on it? For how many years you have ads on it from adsense? What is your CPM? 
(1). yaps, i have it
(2). 5 month ago
(3). CMP arounds $2 - $5, in my country the CPM rate is very low.
Ps. maybe, if your blog have crypto market cap or analisys trading daily it will be more attrative than your site only contains about crypto content.