Sending money to a person you have just met online.
People do it. That´s beyond my comprehension.
I named a kitten "Risky Business" after I brought him home and the cat I already had tried to attack him. The next day as I was about to get off work, my bf arrived at work and said he'd forgotten his till key and had to run home.
An old woman suffering in the heat instead of doing things she should be doing.
The stock market
Prostitution