There are several reasons that do not exist in bitcoin currencies
1. of course done offline if we have real money
To draw Atm / exact withdrawal
2. there is an administrative fee to be paid to the bank unless we have cash
3. all definitely accept it because it is in the form of currency applicable to each country and can be spent again
4. no transfer system if we have cash just pay it and finish the case.
5. not complicated to deal with the exchange rate of currency against the value of the country's currency. So do not be confused