The genuine bills teaching attests that banks ought to give their cash in return for momentary genuine bills of sufficient worth. However long banks just issue a dollar in return for resources actually worth a dollar, the responsible bank's resources will normally move in sync with its issuance of cash, and the cash will hold its worth. Should the bank neglect to get or keep up with resources of satisfactory worth, then the bank's cash will lose esteem, similarly as any monetary security will lose