Most of the coins are free from restrictions but the users themselves give up their anonymity while trading the coin in or out from fiat currency. This is the point where the government can really track users. If we are able to create a self sustaining market around privacy focused coins, there's no stopping it. Though real estates and large physical goods won't remain out of government radar.
You are right about the acquisition of any property. With real goods that you can touch or use anonymity is practically excluded. They will not track the currency for which the product was purchased, but the product itself and its current owner
And you can't avoid those circumstances as we need tangible products in everyday life. It is not that we can use virtual equipment or gadgets or virtual properties. So with these actual properties in possession, that's where we need to comply with government taxes.