Maybe the government is afraid of losing control of their people's money.so far they have always argued that cryptocurrency anonymity is dangerous because it can be used for illegal activities, can be used to avoid taxes, and many countries think it's just a scheme where people can lose money. But I don't believe in all their reasonsI think in the next few years when technology grows they will return to cryptocurrency .
Your reasons make sense about why goverment affraid with crypto. They affraid the crypto will be the way to money laundry and the main point is they don't want to lose the tax from people income. But there is many positive things if the goverment could make regulation and make bitcoin legals.