I lost 40$ for betting on the street
Did you think you would loose the bet?
No, a guy on the street made me believe he was going to look after me with good investment, now I'm broke as a result.
I'm sorry that happened to you.  However, look at this as an opportunity to learn from your mistakes!  You shouldn't have listened to that guy in the first place and handled your money irresponsibly.
I knew the risks when I took action. However, I am not going to let this guy get away scot-free. I have his full name and I'm pretty sure he lives in the capital.
I think that this man does need to be held accountable, but you should carry some of the fault as well. I hope you get it all worked out with him.