Betting on options is like betting on winning the lottery. Your chances are slim (you probably have a better shot at winning the lottery).
Startups are fun, dynamic, an adrenaline rush. It is not about the money. It is about working on something you are passionate about and know that you can, and most likely will, have a direct impact on the success of a company. A startup can open opportunities that only may have been a dream for you in the past.
Yes, the corporate career can provide stability and possibly long(er) term job security, but I can guarantee you will learn way more working in a startup than in a corporate career.
Making the decision really comes down to you though. If you are married, have kids, have significant financial responsibilities, etc... then the corporate world may have a different appeal to you. Your outside influencers (i.e. wife, family, etc...) may have a direct bearing on your choice. Not to say you can't do a startup being married, with kids, and other financial responsibilities, but you have to know your limits and what your life can handle. In these cases it is a decision that should not be taken lightly and should be discussed with your family.