100
To dream of the number 100 represents a new beginning (or starting over) that is different than anything you've done before in a situation that feels a bit unpredictable or chaotic. Taking action or standing up for yourself in a manner that's never happened before without knowing what will happen next. Doing some new on your own that hasn't been done before that doesn't usually get to happen. Feelings about a bigger restart. Starting a new business. Leaving your home country.
Alternatively, the number 100 may represent perfection of a situation or achievement. All of something.
Example: A person dreamed of a $100 bill. In waking life, they were starting a new business that needed to make enough money to allow them to quit their current job. In this case, the $100 bill may have reflected their feelings about the power to initiate a completely new beginning in their life by starting a business that held the potential for full independence and success while also feeling a bit unpredictable.