In late 20s with great friends/partners, opportunity cost shifts from money to time—don't trade life for billions alone
Ibby: 'As I grow older, opportunity cost is not money, it's time. I'm in my late 20s in NYC, surrounded by best people in the world. The cost of this founder job is not spending nearly as much time with people I love. That is a very, very real cost. I don't want to be a billionaire who's alone.' Most founder advice optimizes for outcome (exit size, revenue growth) without considering what you sacrifice to get there. The older you get, especially in prime relationship/friendship years (late 20s, 30s), the opportunity cost of grinding 80-hour weeks isn't money—it's experiences and relationships you'll never get back. This doesn't mean don't build startups; it means be honest about tradeoffs and don't optimize exclusively for financial outcome.
When to use
Reflect on this when making decisions about growth pace, fundraising, hiring. Ask: Am I trading the best years of my life for a slightly higher exit multiple? Would I rather hit $50M in 5 years while maintaining relationships, or $100M in 8 years having sacrificed everything? There's no right answer, but pretending there's no tradeoff is dishonest.
Don't do this
The 'I'll grind now and enjoy later' fallacy—assuming you can defer relationships/experiences until after the exit. Or comparing yourself to 20-year-old founders who can grind 100 hours/week without the same relationship opportunity costs. Or pursuing maximum outcome regardless of personal cost, then being surprised when you win but aren't happy.
1 Founder Who Did This
Late 20s, living in NYC, with great friends and wife. Acutely aware that founder job means not spending nearly as much time with people he loves. 'Opportunity cost is not money, it's time. I don't want to be a billionaire who's alone.'