Do you mean they shouldn't buy and sell, but they can buy and hodl?
Or you meant that they should totally obey the government and not own bitcoin at all?
Does the government who prints more and more fiat to enrich themselves amidst inflation deserve such level of obedience?
My advice is that, if your government bans bitcoin and you find a way to buy and hold, please do and not necessarily buying and selling to go against the government.
I'm saying don't break the law or we'll go to jail. If govt's ban bitcoin we shouldn't trade it illegally.
If we all want to follow how he’s saying we should not go again the government, then we will most definitely not own any bitcoin today. Your government may have banned bitcoin and not allow the buying and selling of it but when you decide to buy some and won’t be penalized for such actions or won’t be a big deal, you shouldn't hesitate to take such opportunity on yourself. If we were to follow on the ban of cryptocurrencies earlier by the government, we wouldn’t have been an investor in bitcoin or own some certain amount of it in the first place.
All users saying they'll buy & sell in secret won't do it. We shouldn't go against our govt's because we don't want to be arrested. Our freedom's more important.