The banking sector believes that individuals use different currencies interchangeably and that they use them only to pay for purchases. In reality, individuals do not use all currencies in the same way, even though these currencies have exactly the same financial value. These various practices deserve to be understood to be better accompanied.
The field survey was conducted through semi-directive interviews with 18 people. The knowledge of anthropology and sociology have been mobilized to understand and analyze the various practices relating to currencies.