Hello, I have a question?

Hello, I have a question? Yesterday I lost my wallet in 광명 ( Gwangmyeong-si ), in less than an hour I went back to the place where I lost it but there was nothing there, I have heard that Koreans are very honest but I come from Mexico and it is hard for me to trust. The wallet was worth a lot and inside there was 1000 dollars so I don't know how honest the people from outside of Seoul are. Does anyone know what I can do? I am really worried because I have my credit/debit cards and IDs in there. I have no way to pay or receive money):