Assume that you are working for a startup on hourly rate basis (let's assume x dollars per hour) right from the start. Now, after y month, the stack holder offers you equity in exchange of hourly rate. Your confidence of that startup eventually pulls off is 50/50.
How do you come up with an equity option that is fair to both of you and your stack holder?
I understand that there is a very subjective question, but I would be interested to hear how you handle this situation.