Crypocurrencies are banned because they are an independent store of value, which is not submitted to fiat money inflation.
In my own opinion, cryptocurrencies are banned because there are some governments who are corrupted since bitcoins and altcoins is one good investment which another way to make money on the internet.
It may happen, but in many directions the country is still in the process of learning about it. And there are still no consensus on the idea. Maybe they are scrutinizing then making a decision. Hope so.
They don't see what is happening to crypto world, what they are just seeing is that bitcoin was a big scam, they are not realizing why many people involves with it, we all know that it is a risk in involving in crypto, but we also know that there is a possibility that bitcoin is our future so we just need to embrace it at the early stage.