I really don't see bitcoin becoming a threat to the country. Why would it become a threat if you can't use it as it is. It can only be a threat if all your citizens are using bitcoin and buying their food in the other country.
But since we have no choice, we have to convert to local currency, that means the bitcoin that we earn becomes beneficial to our economy rather than a threat.
It will only be a threat if it is used by terrorist or way to launder money. I never thought if all citizen buying food with bitcoin as a threat because at a certain point this bitcoin will be converted to its local currency, Meaning the money circulates within the country not outside of the country.