The government's job is to control everything in your country, they don't like the uncontrollable things, from the internet or the banking system, everything is monitored by the government and it is impossible for bitcoin manipulation because it is a decentralized system, in addition to the transaction is not taxed or disclosed personal information, it can lead to money laundering actions, which can damage the country's exchange rate ... so accepting cryptocurrencies is not yet possible, but I believe that in the near future the government will see how big the benefits of cryptocurrencies are and maybe they will amend laws to make cryptocurrencies legal.
Let's also remember that governments are just there to protect all of us, it is not because they are too greedy that they can't control it so they can't regulate it, but they just wanted to protect those people especially who has lack of knowledge in investing, as we all know it is very hard to accused scammers and file a case to them, so let's just understand them in a positive way.