First of all I use one just to protect me from ME! Several months ago, I had won a total of $700 and called my wife to tell her I was about to come home early with at least $600, as I was gonna play thru $100 more and if after 30 minutes or so things didn't really go that good I was leaving. Sure enough, I got down to $60 and started to leave- only my wallet was gone! The cameras couldn't see anyone near where the wallet was found and- yeah- the $600 gone. Fortunately the debit card wasn't. So nowadays I leave my debit card and only leave $200-$300 in my wallet. This serves two purposes. If I hit big, I have to go to the bathroom to place the extra cash in the belt. If I lose-I have to do the same to retrieve extra cash. Point being, I get a way from the action and have enough TIME to think about what I'm doing and if a better decision would be to leave. Not just the fact I'm human and can lose my wallet or worry about a pickpocket.