Look man, you need to understand that this world that we lived in has been doing fine even before the immergence of bitcoins or any altcoin on that matter. Even if we say that people who have tried it have gotten addicted to it like a smoker to his cigarettes, if you cut off the supply, even with unbearable withdrawals, the person gets over them and gets to live a life free of smoking. The same goes with this industry. If the leaders of every country in this world decides to unite for the first time and totally brand crypto currencies as illegal, then we would be forced to stop. Besides, just like how they promote nicotine gums and allow vaping to aide people that stopped smoking, they also have the choice to make an alternative to crypto currencies that we use having the same feel but programmed to be fully centralised and controllable.