I can't tell how many sites (hyip) like this promised a high rate, delivered for a while (in one case over 1 year), then vanished. If you put any coin on such a site, I would advise you to use a small amount, withdraw all returns until your deposit is recovered. Then afterwards you are playing with the "house's" coin, so if you lose it, so what?
RE: Turning .11 Ethereum into 1 Ethereum