I think the government will not ban Bitcoins. I think the government is thinking how to tax this whole thing with a tax so that no one can hide even a small part of their income. The government needs to receive taxes.
Which will be quite hard since different transactions have different taxes and it differs in every country. The only thing that they can do is create their own cryptocurrency which is going to be centralized where people have to submit to the KYC policy. It's pretty much just banks implementing the blockchain technology into their systems. No point in implementing blockchain technology right now as the banks are good as they are now. It will only be a waste of resource and will open up the idea of cryptocurrency to everyone. I can totally see the government being very late in implementing blockchain in their system because of the same reason.
It's both hard and easy to hide your income with something like cryptocurrency. It's hard because there's the public ledger and people can trace you. At the same time, it's easy to hide your trails with the right tools that can let you stay anonymous and untraceable.
Just keep the private key, take a vacation to a bitcoin-friendly country, trade for fiat in person, take the cash home.
I can only imagine how much bitcoins you have if that is your solution to this problem. That's a lot of money and time gone. What I can see as a good solution in here is trading your bitcoin in exchange of Paypal funds from a forum like this where there's a Trust system. Only one scam, no matter how big or how small, and the seller's trust rating is ruined.