Around the world, it’s not uncommon to buy products with digital currency. And the number of people using Apple Pay or Alipay is dramatically increasing, so digital currency will kill the physical wallet soon. Advantages abound, one of which is its convenience. You do not have to have a wallet on you every day. You just pay for things by swiping your cellphone, entering your PIN and sending a certain amount of money to the seller. Furthermore, contactless payment systems are much safer. * On one hand, thieves could never steal your money so easily as they did before. On the other hand, fake (counterfeit) money is no longer the case (fake money becomes a thing of the past). However, there are two sides to every coin. The biggest problem is that you must have your devices on you everywhere. If you accidentally leave your cellphone at home, you may feel hopeless(helpless) because you cannot buy anything. Then you will live without the sense of safety that day. Plus, it is not accessible for old people(for the elderly/ for seniors ** ). They are used to cash, and it would be a hassle when they do not know how to use the payment system. * I'm not sure if "on one hand/on the other hand" structure really works here. You normally use it for opposing arguments. ** I think "the elderly" or "seniors" sounds nicer here. :)