What can a currency exchange do for you that a bank can't? Many people use currency exchanges to cash checks, pay bills or obtain money orders. For people living in neighborhoods that don't have many financial institutions, currency exchanges offer easy access to various financial services. However, currency exchanges earn a profit by charging a fee for most of their services. As such they tend to be a more expensive option than other financial institutions. More importantly, there are no savings accounts at currency exchanges. You won't build up your personal net worth if you only frequent currency exchanges and never visit the bank.