They are not a threat.
Yes reader, you are right, incredibly that is Mr Popescu talking about his 'business' MPEx. If you are invested in or through this scam site called MPEx you want to ask yourself if your money is in safe hands. This man is clearly a bit unhinged. He has no sense of objective reality, he is playing with fire by telling the SEC to fuck off and his reasoned position is - I can play these SEC for fools and they can't touch me.
The facts are that the US extradite tens of people from Romania each year and most of them for internet fraud. Romania is a well known fraudster hotspot and the US and Romanian authorities are working together in putting these scum behind bars. Romania is very keen to integrate into the European Union and to do that they comply with all legitimate extradition requests just like any other civilized nation state.
The first you will know about the successful extradition of MP will be when his site is frozen by the FBI and all stocks and funds on it and in MP's accounts are frozen. That cash will never be returned to you, it will be categorized as the proceeds of crime and confiscated. If you value your money act now and remove it from the control of MP.