In this case we need to consider the regulations and legal laws of the country. We need to understand what will be the punishment of that kind of crime.
So what if, you have 5btc in your portfolio and then months later your government declared a cryptocurrencies ban?
I think you should find ways to claim your bitcoin in your portfolio, you may travel to another country if you want to get it or send it to your trusted friend abroad and convert into fiat. It may punishable if you caught that you are using bitcoin even it is banned, so be careful it is better to still being anonymous in bitcoin like what Satoshi did.