Will they try? Sure, some already have. And it doesnt matter if it upsets alot of people. You gotta see the bigger picture, and the big picture says if crypto continues to grow its going to upset the natural order of the global economy. This gets a bit tricky to explain in limited words. When you start taking power from the powerful dont expect them not to try and take it back. If they cant find a way to adapt to it, bet your ass they are gunna find a way to get rid of it. And your right, it would be difficult to stop me from sending you a coin, but never underestimate the worlds powerful. If they cant stop me from sending btc , they will just make sure btc doesnt hold value anymore. If you understand how markets work, then you prolly understand how someone could make one crash if they, oh lets say endless supply of money... I can see many ways they could pull the plug on it if they wanted too