It's alright! I don't mind telling the story again anyways. I've mentioned it here or there but never in a super public thread.
CashIn - the two words together - is almost an anagram of my first name, with only one letter being off. I got it in high school, because for some reason people always used to owe me money. We used to play ball games in our break time and I always bought the titular ball. Problem is, people used to end up losing it all the time and then they'd promise to pay me back for it.
Ironically enough, I've never been a stickler for cash. I knew the risk, so while I didn't complain when people paid me back, I never expected it. Jokes were soon made, because it became such a regular occurrence and as a result, the "CashIn" nickname came up.
I rolled my eyes at it for a long time, but eventually I signed up for a website and I don't remember if it was here or another forum, but I needed a username. I must've been having an off day, because I was unable to come up with one. I got a bit frustrated, until a little voice in my head started saying "Well, why don't you use that name" and as they say, the rest is history.