Until now I have not seen Facebook will prohibit or restrict cryptocurrency. And I really don't understand if Facebook forbids it. There are rumors that Facebook will issue its own currency, I think it's just a discourse. Not necessarily realized.
A technological person like Zuckerberg will know not to bet against bitcoins am sure it will be a matter of time when Facebook always create their own cryptocurrency and to those who are saying he is against crypto just because he banned ICOs you should know that it was a safety measure for all.He doesnt want to be the accessory to any criminal enterprise.