The goverment from many country is worry whe the money in his teritory is going in other country who can his country in bad condition and its can makr a crisis
Different government has different Agenda with cryptocurrency. Some government work with cryptocurrency to built their economy strong. Where as some government ban cryptocurrency in their country because it affects their country economy. Many cryptocurrency ban it because of cryptocurrency decentralised nature. And cryptocurrency are digital in nature because of this its user doesn't give tax to their government and this thing negatively affects an country economy. Cryptocurrency volatile nature affects an country share market so because of these reasons many government ban cryptocurrency in their country.