You try to help someone and this is how you get repaid.
If you were just trying to help him, don't stake the guy, just give him the money. Staking = investing, you just made a bad investment.
We had reports back in my country that there are every weekend two buses full of pickpocketeers heading to our beautiful city to play with foreigners pockets? Guess where they've been from?
I'd lay 3:1 they were of Rrom ethnicity (gypsies).
I've always said things are fucked up in Romania and that most are proud when scamming/cheating some other guys, bribery happens on a day to day basis. But from this to pocket picking there is a long way... I might make a more detailed post in my blog this weekend concerning all this.
Truth of the matter is that you should be very careful when staking anyone, not just because of the initial investment but because of the ROI you deserve if he makes a lot of money.