As great as it is, there are a few cons to consider! If you carry all the cash with you everywhere you go, it does put you at risk for theft. You'll need to be mindful of the cash and keep it out of sight so no one sees you have it. In addition to theft, there is a chance you could lose the money. If you tend to lose things frequently including your purse or wallet, this system may not be a good choice for you.