Facebook get huge amounts from these types of advertisements so why they ban such things which provide them profit,at the same time facebook is not just to make new friends across the world but it also about promoting advertisements.
Yes.Facebook may be a good step in promoting cryptocurrencies but they are just being careful of the things they want to advertise or promote knowing bitcoin has been involved in a scam.Facebook is not really against bitcoin or any other cryptocurrency.Surely they will start promoting bitcoin too when other social media has started already.