why bitcoin is still illegal in many countries of world

Is there any solid reason behind this ??/
Bitcoin don't really needs in some countries where they don't accept it just because they their goverments don't wants to have another currencies to be use dollars is already okay for them if bitcoin will unban in some of countries like russia then it will be good as well bitcoin will be more stronger and more reliable in the future.
Russia is one of the first wants to introduce criminal responsibility for the execution of the cryptocurrency. The ruble has always been called "wooden". No one appreciates that. As soon as you can earn currency, people will do it. Russia's economy is already falling, and in this case will in General collapse.