Too good to be true

A couple of days ago I came across a bitcoin investment advertise on the site:

http://www.bitcoinmutualfund.net/index.html
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Their profits were incredible and I sent the following query:

Thinking of initially investing 0.1 BTC to your mutual fund.

I have few questions:

1. Can I transfer BTC directly from my bitcoin wallet to yours?
2. Will I be paid in bitcoins and how much will I receive for 0.1 BTC invested?
3. If so, can you send me my investment directly to my bitcoin wallet?


The answer was:

1. Yes, you can
2. 0.8 BTC
3. Yes

This profit of 700% is realized in 48 hours.
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Does anyone have any experience or opinion about it?