Fractional Reserve Banking (FRB) is an inherently unstable complex system.
Each and every bubble and crisis has some kind of link to FRB, going back thousands of years.
Even where financial crises are caused by natural disasters (the San Francisco earthquake of 1906 being a prime example), the financial crisis only followed because banks did not have enough reserves to pay out worried depositors – due to fractional reserves.
In a nutshell, depositors wanted what they thought was their property back, only to find it did not exist.
Over 70% of people in the UK believe that money placed in an instant access account remains their property. This is not the case.