Well another project a bit more elaborated then the usually doublers running it may let some people to double but others wont see a satoshi from it.Its more risky then any thing,and you main investment will return after two years.
Return in two years? May be in dreams... Never invest to any doubler or HYIP kind of bitcoin investment programs. They will swollow your money in one or two days after giving you some initial confidence. Better stay away from them always.