And the computer systems that run the bank. And the disaster recovery systems that back up the bank. And the cars that come to the bank to do banking. And the c

And the computer systems that run the bank. And the disaster recovery systems that back up the bank. And the cars that come to the bank to do banking. And the construction vehicles that build ATM's, bank vaults, bank buildings. And the furniture production systems that supply the bank with furniture... It goes on and on. Most of that stuff, bitcoin doesn't have to do at all.