It's an easier crime to commit, although maybe not to get away with. There are banks on every corner, their layouts and policies are similar, and you know where

It's an easier crime to commit, although maybe not to get away with. There are banks on every corner, their layouts and policies are similar, and you know where the cash is. If you were going to rob a millionaire, where would you start? Who would you target, how would you case their home, and what would you try to steal? As smt88 points out, it's not like they're likely to have lots of liquid assets lying around the house. A lot of millionaires have a big portion of their net worth in equities and real estate, and the majority of their cash is almost certainly in the bank.