Best way is to destroy scams. Having scammy exchanges, scammy people running away, this is what make the trust to do not come. Little by little, by not funding them will make them disappear, and a trust will be contructed over the time.
Destroying scams is a very hard task, they are everywhere. What the government or us should do is to raise awareness. If we will raise awareness to the people and to the government about those technique of scams then it will be possible that the government will accept bitcoin and will accept the fact that bitcoin is good for the economy.
Once government finds a way to control or manipulate the bitcoin users surely they will let people know it for their people can earn and be benefited from it same with they can get taxes through the users once they find a way how to put taxes on each user.
Yes it is a sure thing that they are going to manipulate us because the government is always for the tax or profit for the government. Each of the local exchange that has been based on your country will be taxing each of your receiving or sending transactions. I hope that is not going to happen so that we can still pay smaller fees.
That would be the obvious scenario if ever the government finds a way in manipulating bitcoin. First is the additional fees for every transaction. Since the government is able to control bitcoin in their territory then additional fee will exist for the additional gain of the government. Second is implementation of tax. Since bitcoin is a form of investment on other people, tax will be included in the picture. Also, if bitcoin is used in businesses, tax is highly expected. Finally, that particular country will be full of businesses and shops that are accepting bitcoin as a mode of payment. This is a good side if ever they, the government, will be able to manage bitcoin. High rate of transaction will occur and more and more people will be attracted to bitcoin.
I think the increase in additional fees will come in when the amount of people using bitcoins has also increased. I don't think the government will add fees by themselves for every transaction being done, because we see in fiat that we can transact it all without fees.
I still doubt that people wouldn't leave bitcoin when the government were able to have control of it. There's just no point in the government taking the time and effort to get control over bitcoins because it will only affect a million of people which in a global scale is considered as small.
But we should not disregard the fact that the popularity of bitcoin is growing rapidly. And no one will guess how the crypto currency will affect the economy of the country. Therefore, the government can show great interest in bitcoin