That's not really possible to keep track of the users as well to make the people stop the usage of bitcoin. These days governments too have the plans of making use of bitcoin, than abolishing it. Because people tend to use it one or the other way, so that it's not possible to abolish it. Expect more countries to get into bitcoin usage and make it grow higher same as that happened when Japan entered the community.
Exactly. Since they cannot stop people to use bitcoin, government intends to legalize it to use cryptocurrency for the benefit of their own country to it's maximum extent. For this reason, some countries like Russia or Uruguay launched a cryptocurrency of their own to aid in their economic status. Countries other than Japan are on the process of adopting btc with the hopes of regulating it in a way and using it to their advantage.