A former colleague in a big accountancy firm, who is also a friend, has started up his own fintech business. He has invited me to join as the chief financial officer.

The salary is lower than what I currently enjoy but there are potentially lucrative stock options offered, and, of course, the opportunity to help build the company. I am tempted to go for the job but I have some worries about the uncertainty. Do you think it is worth leaving the stability of my current job?