UnicornU, You are represented by Venus, but your money is a second house matter, ruled by Mars. The moon shows your emotional stake in the matter. I'll put this man as a 7th house matter. He's ruled by Mars, as well.
Either way, Mr. Mars is not in a strong position. It has no essential dignity, and is out-of-sect. He's in your 8th house of investments in modern astrology, but traditionally, the 8th house (along with the 6th and 12th houses,) is considered an unfortunate placement. Another way to think about it, is that in a turned chart, your 8th house is his 2nd house. He's thinking about his money, not yours.
Venus (you) is in the sign of her detriment and picks up no other essential dignity, so she's not in a strong position, either. Just now she applies to a sextile with Mars, and is usually the faster planet: you'd like for this arrangement to work out.
But actually, the aspect never perfects. The transaction doesn't happen. Sometimes Venus does not move as quickly as Mars, and in this case, Mars slips into Cancer, the sign of its fall, before Venus catches up to him. Jupiter, the ruler of the house of Venus (you) is in the 12th house, which suggests some kind of deception.
The moon applies to a square with Mars: so no, you actually deep-down do not believe this is a good financial investment.
I see no reason why this proposed transaction would go smoothly from an astrological perspective. Neither one of you is in a good position: you to give this man money, or him to invest it wisely and return it to you at a profit.
And this is consistent with practical advice. What you've described sounds like one of the oldest Internet scams going. You have no idea who this man is. Even if he's shown you a picture, it might not really be him. Have you skyped with him? If so, ask him for evidence of his investment credentials.
So please keep your money in a safe place. Above all, please do not give him any credit card or bank account information. If you have done this already, please notify your credit card company and bank that you anticipate a scam.
Please let us know what happens, UnicornU.