with a rules like:
bank cant play but can admin a room
can send tc without playing 20 games
the user bank can enter and take from the bank without relogging in in that account
so what do you think write more

Where can I make bank and where the bank get the tc?

will it would be in your shop and the money is from you
you give money to your bank
oh and another idea maybe a server bank
where everybody can take what they putted

А̩ don't understand your logic