Since I've been with this bank for so long, I'm going to ask them to show my boss's bank account balance.
That doesn't make sense to me, why would you want to see his account balance? Everything should be private.
There are a lot of reasons that it makes sense, he could be a high ranking official in a bank where a high ranking official is a likely a victim of a major security breach making him paranoid.
Going behind your bosses back and attempting to see his account balance is a violation of his privacy. If you're curious about is finances you should try to talk with him about it. Going behind his back most likely will result in you getting fired.
It's fine, he needs to have his ass whooped anyway.
I think you need to try and give your boss more respect, you work for him and he gives you wages and bonuses. I don't think it's fair to belittle him or try to pry, because that can ruin your work relationship. Why don't you try to be more friendly and get on good terms with him first before trying to ask about personal finances?