The bank in question has really poor security, and is ripe for the picking.
A bank teller steals money from Evil Elliott (either intentionally, or due to an error in bean-counting.)
Evil Elliott deposits money in his bank account.
Evil Elliott owns the bank as its CEO, and robs the customers via every fee and outright scam he and his employees can think up, and finally robs the country the bank is located in by demanding a bailout when the scammed customers start defaulting and the crappy investments fail.
Evil Elliott doesn't steal money from the bank...
Evil Elliott robs a sperm bank, blood bank, etc. instead of a normal bank.
Evil Elliott gets a job as an accountant or bank teller (or sends one of his Mooks to do so.)
Evil Elliott attempts a bank robbery, but is arrested before he can complete the bank heist.
But participates in shady business practices and/or such things as drug-dealing and pimping, making ungodly amounts of money from that, or he robs someplace else containing valuables (such as a museum).
But then sells the sperm/eggs/embryos/blood/whatever on the black market and makes money from that.
Exploited: Detective Joe, who's been searching for Elliott and his gang for years, tags all the money in the bank before hand and is intentionally slow in answering the silent alarm. When Evil Elliott returns to his hideout with the money, the police arrest him and his entire gang.
Defied: Evil Elliott believes that robbing banks is kid stuff, and chooses another way to make an ill-gotten fortune.
Evil Elliot: "Hey guys, I'm thinking we should go do something evil... and preferably lucrative. How about we gear up and go rob a bank?" Lilith Badgirl: "Are you stupid, Elliot? We try that, the entire city's worth of cops will be all over us before you can say "cha-ching"!"
Conversed: "This is the fifth issue in a row where Amazing Girl stops a bank robbery. You'd think the crooks would try something a bit more subtle to raise cash."
Implied: Evil Elliot and his gang are shown with a pile of money bags marked with bank logos on their table, trying to decide what to spend it all on.
Deconstructed: A bank robbery goes bad and ends in a hostage deal, several dead tellers and customers, and a stalemate with the cops.