Do you think governments are afraid legalizing bitcoin because it's difficult regulating its use, circulation, determining individual's worth, earnings and may lead to tax evasion?
If the governments are afraid to Bitcoin maybe they are just protecting their citizens for the wrong usage of Bitcoin as a digital money, I think every government in the world must make a specific department like for example 'Department of Cryptocurrency' to study the benefits and negative impacts of Bitcoin and other cryptocurrency in future of their country because it is now a trend and more new people in different countries are in these Bitcoin scene.
Denmark is one of the most technologically advanced countries in the world, Denmark is also the most frequent campaigner and persuasion with the elimination of cash and in exchange for virtual money like bitcoin.
Although bitcoin is well received in this country, but the government does not give 100% of their support to legalize bitcoin
You know why the government did not legalize bitcoin in some countries? Because they think that this technology bitcoin may the biggest competitor in our country someday and the bank will be left behind on it. Central Bank of each country fully supports our government then they afraid that someday the bank will not have an investor because of bitcoin.
Another factor is bitcoin may use in illegal activities and may be abused in a terrorist group to purchase weapons and other prohibited by the government.