There is no fixed answer because everyone's preferences and habits are different. However, wallets are really popular in some countries and regions. For example, in some European countries, such as Germany and Austria, wallets are considered as a practical accessory, which can conveniently store wallets, mobile phones and other small items. In countries such as the United States and Australia, wallets are regarded as travel accessories, and personal belongings can be easily carried in outdoor activities. In addition, some sports and fitness enthusiasts also like to wear leather bags, because it can help them carry water bottles, mobile phones and other items conveniently during exercise. Generally speaking, the preference for wallets is related to personal cultural background, habits and needs.