Facebook bans all crypto-currency ads

Well it must be annoying to get crypto-currency ads running in the side-bar while browsing on any social media platform, I'm glad that Facebook has started to ban this kind of advertising.
I'm pretty sure an average person is going to find crypto-currency advertisements a revelation that could lead to their success, but personally I couldn't be bothered mining, even if there's a huge opportunity for it.
I guess that if the trend of crypto-mining eventually dies down, Facebook may allow them back.