It is a bet. Nothing more, nothing less.
I am betting that either they aren't a Ponzi or that I can pull out in time after my 120 days are expired. Both work fine for me.
It is not an investment for everyone! What I am debating here is that the field is so loaded with scammers that people are being paranoid to the point of ignorance.
Also it is a shadow "company", not a website. They are registered, albeit in a "shady" country: Panama. They have given away their identities (may be false of course), their strategy (which works ON PAPER) and are funding Bitcoin Related avenues like Bitcoin 2014 Amsterdam.
Is this enough? NO, nothing will ever be enough to justify such high yields short of seeing them personally do their craft.
Go ahead! Experience is always valuable both to newbies and experts