Magic of money

Magic of money. 

Person A deposited 15 crore to bank, Person B made hospital by taking loan same amount 15 crore to paid contractor, contractor deposited to bank 15 crore. Person C made shopping mall by taking loan 15 crore and paid to contractor, contractor deposited to bank 15 crore.  Now we have same money 15 crore in bank and we have also one hospital, and shopping mall. Money never decrease by investing, it always creates new value in economy after investing. Now bank has 15 crore cash, 30 crore in  investment account in assets side = 45 crore liabilities of customers. If all customers in once time go to take all money which they deposited, bank simply can’t pay to them. But this situation is  never happened in normal condition so bank can run normal way. In crisis situation if all customers go to get money from bank, which they deposited, bank simply may be collapsed, in this situation central bank must support by provide loan to commercial bank then bank run again normal way.