Questra World doesn't seem to be legit. Its completely a big scandal. For the time being now everything is going fine and its not a scam till now. But the way they are publishing and advertising their illegal ponzi scheme, becomes a matter of concern.
I can say with guarantee that sooner or later this scam will definitely come out and within a day all your money will be gone. I can say this because Questra World claims to give high interest on your money around 4–5% per week. So the question is from where do they get so much interest. So their main plan is, initially give the returns and when more people will deposit their money then they will vanish with in no time.
So my best advice is to stay away from these sites and companies that claim to give unusual and lot more returns than others. One simple thing to check them is, do they provide any loans. If not then where does the money come from.