Now, ask yourself why the government would continue to spend hundreds of millions of dollars on mass surveillance when they knew it wasn't preventing attacks or leading to convictions?
I am not following these minute details but one thing is certain that we have not seen any major terrorist attack in the US for a very long time and whether these mass surveillance has anything to do with is out of my scope.
One thing i am finding it hard to understand is that how come they are able to identify bitcoins linked to terrorism, they might have seized the coins claiming the users have links to terrorism but there is no proof regarding that.