Accept that you might have enough

Reflect on your ambitions
Consider how potentially dangerous they are, and whether you are risking too much in order to achieve a certain goal.

Set a goalpost
Identify the lines that you will not cross in your professional life. Know how much is too much.

Make a list of things that are not worth risking
If your ambitions threaten the most important things in your life, give them up. Some things in life are more important than any financial success.