That's obvious, see the site:

only with an investment of 5 btc the person earns 1 btc per day, 30 days is 30 btc and in a year they are 365 btc, this is absurd. and anyone should know that this is absurd, now why would someone invest in this site? The answer: Greed.
is not bitcoin mining, that just another ponzi/hyip scheme
These guys are thieves