That all makes sense but in practice, it is hard to calculate how much you will make in a startup (if we could, we obviously would either give up or go on) For

That all makes sense but in practice, it is hard to calculate how much you will make in a startup (if we could, we obviously would either give up or go on) For instance, you can easily go through years 1-4 making 1/2 your income. But all of sudden in years 5-6, you gain more credibility, your product starts to achieve PMF, word of mouth takes over, etc. And maybe in years 7-8, you attract a big company that buys your company, and all of a sudden you just earned the equivalent of 25 years of a salary.