Things like this aren't new. In our country Bitcoin has been taxed by regulating local traders. I think registering is not that bad enough because that is a good step towards legitimacy. Also if that country offers a very cheap electricity, why would they moved out right?
It's not a total taxation. It means that only when you're converting to fiat that you're required to pay. Bitcoin being taxed would mean that blockchain funds would be tracked after coming out of exchanges to people's wallets and if they got gains due to the price going up they'd have to pay taxes regardless of whether they are converting or not. We are still far from such outcome.