BlockChain.info Investments? Sounds like a scam
It seems obvious to me that this is a scam. No legitimate investment in the world can guarantee a rate of return of 20 percent per day. At that rate, with a 5 btc initial investment, you'd own all the bitcoins in existence after 81 days.  And after 15 months, you'd have this much.

But you may want to contact blockchain.info directly; there is a contact link at the bottom of their home page. They can confirm that this is a scam, and also announce it on their blog / Twitter feed to hopefully keep anyone from falling for it.