Why do you want to move to America? Do you have long-term working arrangements, meaning you'd have money to afford to live here? Do you have a love interest in which both of you are serious enough to warrant a move to a completely new country, even without working arrangements? Do you not have family that you regard highly enough to warrant being able to see?
I live in America, and can tell you it's not all it's cracked up to be. I love it, and don't want to leave it, but I don't see why you'd want to move from Europe to here. There's just as many psychopaths here, and the "opportunities" you speak of are not as plenteous as you make it out to be, especially since I do not know your educational background.
There's an old saying, "The grass is always greener on the other side." Adhere to it, as once you'd come here, you'd realize it's not as great as you think, and it's not as bad there as you think.