The U.S. has been a cashless society for generations.  Few people even know what cash is.  They think federal reserve notes are cash.  They are not.  
Alaska has cash in circulation and you can spend it at any business, though the scales are out of sight until you break out the cash.  They can make change in cash or federal reserve notes.  
Federal reserve notes are the middle ground between digital currency and cash.  I&#x27;ve never seen anyone spend cash in the lower 48. 
I&#x27;m sure that Somali currency is not cash either.