“money in the bank”可不只是“银行里的钱”，还有“ 稳操胜券、稳赚”的意思。

【例句】
Dave,it's a sure chance to make some money. The location is perfect,my brother has found a great chef and a real bargain on equipment,believe me,it's money in the bank.
Dave，这是个准保赚钱的好机会。饭店的地段特别棒，我哥哥又请到了一位了不起的厨师，他还买到了廉价合算的设备，相信我， 你稳赚！

I have a little money in the bank to fall back on.
我在银行还有一点钱，需要时可以动用。