Well, everyone here discusses the bottlenecks of the project, someone even mentions Mayweather, but just if to be sober: which project is secured in the cryptomarket? Nobody can give guarantees as for any project in it. Maybe, Centra was only the first one...
They're going for the most obvious and public scams. Centra wont be the last. Thats why its so important to do your due diligence with each project, specially for projects from the US.