This is a Ponzi scheme. It is a scam. If you invest in it, you will be aiding and abetting criminal activity, and you will probably lose your money.
I will be here to remind you what idiots you all are afterwards, too.
I agree. The talk about having to hide trades is nonsense. Even mutual funds in the states show all major holdings every quarter. Places like this just want to get a large pool of BTC and then disappear.