Siddharth Rajsekar argues entrepreneurs should focus on one niche, not multiple markets. He uses the metaphor "Can you handle two wives?" to show why splitting attention fails. A niche can shift as you grow, but only if you stay fixed on your vision while staying flexible on how you get there.
Chapters
Can you handle two wives? Okay, you can't handle two wives, right? I can't handle two wives, and I, I don't plan to also. You can't— some people can't even handle one. Now the question is, when you're building a niche, pick one. If you feel that that is what you're going to be aligning with, build it. And just like a relationship, in the beginning it may not work out, but you got to make it work. Now in a relationship, you got to invest your time and energy to making that relationship work. Same with a niche. Now in case after a long period of time you realize that, okay, this is not what I truly want, this is not what I'm subscribing to, this not— it's not aligning with my vision, then then you can evolve it, you can take it to another niche. So I've learned this from Jeff Bezos. He says, "Be fixed on your vision, but be flexible on how you get there." Most people are fixed on their method and they are flexible on their vision, and that's where the problem is. So once your vision is clear, the niche will evolve along with you. And the best thing is your life is your niche. So as you're growing, your niche will also grow.