your bank is the little ’💳’ icon in $balance
and $profile
. it is used for levelling up.
technically, yes, your money cannot be robbed from other playes when it’s in the bank. however, that is not the bank’s main purpose. the bank’s purpose is for levelling up. to level up you need a certain amount of xp and money for each level. as you reach higher levels, you will need more money and xp. eventually reaching the size capacity of your bank.
when levelling up your bank will gradually increase, but not at the same rate that is needed for level ups. for that you will need to use stolen credit cards . they can be found in crates and scratch cards just like other items. they increase your bank size by a random amount, and will eventually be needed to use so that you can level up.
bankrob is for stealing money from nypsi, money is given to nypsi when they pay tax. more information on bankrobs can be found here