How about adding ATM Machines?
This will be good, more realistic. You can goto the bank and do /c ATM <Amount 0-5000>. The command can be done only once in an hour by the same player.
Why should /c atm work at bank only?
Theres already a /c withdraw.
About scattering ATMs around the city, it wont hurt much.
But as Kessu said, theres no urgent need for it. (Unless someone is robbing the bank, and you wanna withdraw

)