Scenario: The Federal Reserve Bank prints as much damn monopoly as they want, send the price of Bitcoin into outer-space, when they are the only remaining buyer(s), they crash the price and buy the majority of the supply. Game over.
Thoughts?
Even though the Fed isn't technically the government, if the government wanted to end the BTC ride, they would just use legislation to go after the exchanges and/or users - i.e. labeling users enemy combatants/terrorist and the exchanges as money launderers. They wouldn't have to use economics to crush BTC at least for Americans. Nothing is to stop other governments from doing the same and the scenario isn't ruled out right now since there is still a lot of progress to be made in terms of public adoption.