Manipulation is always there and I think even if the government would show this as not truly a manipulation they can show this to the public as part of the law, but I guess the government would not give any law if they didn't see any wrong things about it, I guess you can surely own something that is your right, for example, you can own a gun with a proper paper license but that very gun is used to killing someone or used illegally I guess the government will do a proper action about this they may implement a gun ban, Then even if a person would have proper property with the gun it can still be confiscated, I guess the government will lead to something like this if Bitcoin or other cryptocurrencies would be used illegally.