# Decide whether the idea is worth the opportunity cost

Markdown copy of https://realalpha.app/s/decide-whether-the-idea-is-worth-the-opportunity-cost/ on Real Alpha, the best minutes from long interviews with the people building AI. Cite and link the page, not this copy.

- Speaker: [Tarek Mansour](https://realalpha.app/people/tarek-mansour/) · Tarek Mansour is cofounder of Kalshi. · Built Kalshi, the federally regulated exchange for event contracts, with co-founder Luana Lopes Lara.
- Host: [Sonya Huang](https://realalpha.app/people/sonya-huang/) · Partner, Sequoia Capital · Works with OpenAI and Anthropic; co-wrote Sequoia's essay on generative AI.
- Host: [Pat Grady](https://realalpha.app/people/pat-grady/) · Co-steward, Sequoia Capital · Joined Sequoia in 2007; backed Snowflake, Zoom, ServiceNow and OpenAI.
- Show: Training Data
- Episode: [Kalshi's Tarek Mansour: Chaos by Design](https://realalpha.app/v/l_Boz3KRtBQ/), Jul 9, 2026
- Moment: 28:29 to 31:02 of the episode (3 min), playing on https://realalpha.app/s/decide-whether-the-idea-is-worth-the-opportunity-cost/; the episode from there: https://realalpha.app/v/l_Boz3KRtBQ/?t=1709

## Quote

> “it's a career, right? **It doesn't end**. You have all sorts of different issues over time.”
> — [Tarek Mansour](https://realalpha.app/people/tarek-mansour/) at [30:14](https://realalpha.app/v/l_Boz3KRtBQ/?t=1814) · Training Data

## Takeaways

1. Continue when the idea itself is worth the sacrifices.
2. Treat opportunity cost as a reason to consider leaving.
3. A successful company brings new pressures, not an oasis.

## About this segment

Tarek Mansour says to keep going when the idea itself is compelling, not for the imagined rewards of success. He argues that the opportunity cost is real and company-building brings new pressures.

From “Kalshi's Tarek Mansour: Chaos by Design”, Jul 9, 2026. [Watch the full episode](https://realalpha.app/v/l_Boz3KRtBQ/)

## Transcript

Transcribed by machine (Whisper) from the episode’s audio, so a word may be off here and there.

[28:31](https://realalpha.app/v/l_Boz3KRtBQ/?t=1711) Advice for the CEOs out there walking through the desert. You know, the book, is it Ben Horowitz, that wrote a lot about the... Hard thing about hard things. Yeah, there's that paragraph that's so good about it, which is like the reason why it's hard, it's not like you're lifting something heavy or whatever. It's like no one can reassure you that it's going to end, right? Like what I firmly believe, and I really do, is the number one reason...

[28:52](https://realalpha.app/v/l_Boz3KRtBQ/?t=1732) Did you want to give up? For sure. every day you wake up you're like what am i doing and was luana like no we're sticking with it like what was the dynamic i mean we both had our points luana was definitely much more stubborn okay continuously like luana is just like yeah you know like luana had a lot more than you know stop being a little bitch basically like you know just life is fine whatever like let's move on yeah and what i believe is basically if you give yourself enough of a time horizon you inevitably we win or you run out of money yeah but i think that's like a i don't think it's a real killer of companies okay you can always extend your runway and like it's not that hard to raise money nowadays yes and you can pivot with the new idea and like nowadays it's it's really the number one

[29:32](https://realalpha.app/v/l_Boz3KRtBQ/?t=1772) risk is giving up right and and so but but then but that it's interesting because when i say that to me the message should not be like oh i should like do it at all i see a lot of founders and they're walking through the desert i think they should give up because it's opportunity cost yes you're 35 you're gonna spend the next four years walking through the desert start something new i think just ask yourself why you're doing it right so so it goes back i mean you know that you know this like to me maybe like there's a few buckets there's like the idea is something that you're really passionate about you should keep going right because you're There's, I think it's hard.

[30:01](https://realalpha.app/v/l_Boz3KRtBQ/?t=1801) I mean, maybe you're not, but like, then there's a second bucket that's sort of all the things that people believe to be true after you make it. And I think that's a bad, I really think that's a bad reason. I like, because, but you know this, like it's, it's, it's a career, right? It doesn't end. You have all sorts of different issues over time. That like thing in your gut stays there. It never leaves you, right?

[30:26](https://realalpha.app/v/l_Boz3KRtBQ/?t=1826) You're always stressed. You have to make sacrifices on your life. Like entrepreneurs don't have a good life in the traditional sense of the term, right? You don't get to that oasis that you thought you were going to get to, right? You actually just get into different deserts and those deserts get maybe less, there's some water in the desert, but like, but maybe the better analogy is like, you go from a desert to like a storm and that storm sometimes is like very clean water.

[30:53](https://realalpha.app/v/l_Boz3KRtBQ/?t=1853) Sometimes it's a shit storm. Sometimes it's like, you know, and then, you know, but it's a different type of, you know, craziness or or and maybe it's more motivating day to day it's stress and it's not just like