During the dot com boom it was a always an issue if your company took too much VC money. Having a fat bank account balance can make you lazy, you can spend on things you don't need (Aeron Chairs for Everyone!) and you don't "sweat the details." but a lot of the things startup teams need to learn how to do are the exact opposite, spend only when necessary, sweat all the details, understand where every dollar of your monthly burn is going and ask yourself every month "Did that dollar work as hard for me as it should have?" With too much money it is easy to lose the discipline to keep the business at the forefront of your thoughts.