Sam Altman

Altman is a prolific early-stage investor who backs deep tech and moonshot ideas. His portfolio through YC and personal investments includes hundreds of companies.

His personal bets tend toward civilizational-scale technology — nuclear fusion, longevity research, AI safety. He has said he thinks the most important investments of the next decade will be in energy and AI.

He also holds significant OpenAI equity (though the exact structure is complex given it was a nonprofit converted to capped-profit).

Balaji Srinivasan

Balaji invests at the intersection of his two core theses: Bitcoin as the global reserve asset of the internet, and biotechnology as the next great frontier for human freedom. He backs companies building decentralized infrastructure, health tech, and tools that reduce dependence on traditional institutions.

He is a high-conviction, concentrated investor — he does not hedge his bets intellectually or financially. He tends to write detailed public theses before investing, which is unusual and means his investment philosophy is more documented than almost anyone else in tech.

Sam Altman

Altman believes we are approaching AGI — artificial general intelligence — and that it will be the most transformative and potentially dangerous technology humans have ever built. He thinks the right response is to build it carefully rather than cede the frontier to those who might not.

He argues that the returns from AI will be so large they will need to be distributed broadly to prevent catastrophic inequality. He has floated ideas around universal basic income funded by AI productivity.

Balaji Srinivasan

Balaji's philosophy is that the nation-state is a legacy technology and the internet will eventually allow people to form new voluntary communities with real governance and economic sovereignty. He calls these "network states." Bitcoin is central to his vision as the currency that operates outside any government's control.

He is deeply skeptical of fiat currency, mainstream media, and legacy institutions. He thinks the next century will be defined by who builds the new infrastructure — and that it will not be governments.

Sam Altman

Altman has said that playing it safe at this moment in history is the most dangerous thing he could do. His belief: AGI is coming whether OpenAI builds it or not — the only question is who builds it and with what values.

That conviction makes conventional risk aversion feel irresponsible to him. He holds large personal positions in nuclear fusion companies and longevity biotech — bets that could return 1000x or go to zero.

He has said that any genuinely interesting bet carries existential downside risk. That is what makes it interesting, not a reason to avoid it.

Balaji Srinivasan

Balaji made a $1 million public bet in March 2022 that Bitcoin would hit $1 million by June 2023. He lost.

He paid without argument. His approach to financial risk mirrors his intellectual approach: take a strong public position, defend it rigorously, and be willing to be wrong visibly.

He views conventional financial risks — dollar debasement, hyperinflation, government asset seizure — as far more real and underdiscussed than standard investors acknowledge. Bitcoin is his hedge against civilizational failure, not market volatility.

Sam Altman

He has written about sleeping 8 hours, exercise, not scheduling meetings before 11am, eating the same lunch every day, and blocking large chunks of uninterrupted time for thinking. He is a known prepper — he has said he owns land, gold, guns, and antibiotics in case civilization collapses, which is a mildly alarming admission from the CEO of the company building AGI.

Balaji Srinivasan

He has written extensively about health optimization — he tracks biomarkers, does regular blood work, and thinks about health as an engineering problem. He works remotely, publishes constantly, and operates across multiple time zones.

He has moved between the US, Singapore, and other locations partly due to his belief in geographic optionality and partly due to his views on regulatory environments.

Sam Altman

OpenAI and ChatGPT. The launch of ChatGPT in November 2022 was the most consequential product launch in tech in at least a decade.

It brought AI from a niche technical field into mainstream awareness overnight and made OpenAI the fastest-growing AI company in history. Altman navigated the transition from nonprofit to commercial entity, secured $13 billion from Microsoft, and built a company valued at $157 billion within five years.

Balaji Srinivasan

Counsyl. The company made genetic testing accessible and affordable for expecting parents — before Counsyl, comprehensive prenatal genetic testing was a premium service for the wealthy.

After the $375 million acquisition by Myriad Genetics, the technology reached millions more families. It was a case of entrepreneurship with direct medical impact at scale.

Sam Altman

Being fired by his own board in November 2023 — and the board's subsequent reversal. Whatever actually happened in those five days is still murky.

What is clear is that the board lost control of the situation the moment it became obvious that without Altman, most of the company would leave. The board members who voted to fire him are gone.

Altman is back with more power. The episode revealed real governance problems at one of the most consequential companies in history.

Balaji Srinivasan

The $1 million Bitcoin bet. In March 2023, he publicly wagered $1 million that Bitcoin would hit $1,000,000 within 90 days.

The counterparty was journalist James Medlock. Bitcoin was around $25,000 at the time.

It did not reach $1 million. Balaji paid the full million.

He framed it as a statement about hyperinflation risk rather than a pure price prediction, but the optics of losing a $1 million public bet were difficult regardless of framing.

Sam Altman

Sam Altman dropped out of Stanford in 2005 to co-found Loopt, a location-sharing startup. Loopt was acquired in 2012 for $43 million — not a huge exit but enough to establish him as a serious founder.

He then became president of Y Combinator in 2014, succeeding Paul Graham. Under Altman, YC expanded from a small cohort model to a much larger operation with global reach, including backing Airbnb, Dropbox, Stripe, and hundreds of others in its portfolio.

In 2019, he stepped down from YC to become CEO of OpenAI. The company launched ChatGPT in November 2022, which became the fastest-growing consumer application in history — 100 million users in two months.

In November 2023, the board fired him. The entire company revolted.

Microsoft — OpenAI's biggest investor — nearly hired him to run a new AI division. Five days later, he was reinstated with a restructured board.

OpenAI's valuation hit $157 billion by 2024.

Balaji Srinivasan

Balaji Srinivasan earned a BS, MS, and PhD in electrical engineering from Stanford, plus an MS in chemical engineering. He co-founded Counsyl in 2007 — a genomics testing company that made prenatal genetic screening affordable and mainstream.

Counsyl was acquired by Myriad Genetics for $375 million in 2018. He became CTO of Coinbase in 2017-2018, one of the highest-profile roles in crypto.

He was also a general partner at Andreessen Horowitz (a16z) before joining Coinbase. He has been an outspoken Bitcoin maximalist and wrote "The Network State" — a book arguing that internet communities can secede from traditional nation-states and form new countries recognized in the digital world.

In 2023, he made a public $1 million bet that Bitcoin would reach $1 million within 90 days due to hyperinflation fears. It did not.

He paid.

Sam Altman

OpenAI (CEO). Y Combinator (former president).

Loopt (co-founder, acquired 2012). Personal investments via Sam Altman Fund and early-stage bets.

Notable: invested early in Stripe (now worth $70B+), Helion Energy (nuclear fusion), Retro Biosciences (longevity). Also holds equity in Anthropic indirectly.

Balaji Srinivasan

Counsyl (co-founder, acquired 2018 for $375M). Coinbase (former CTO).

Andreessen Horowitz / a16z (former general partner). 1729 (newsletter and tasks platform).

The Network State (book, 2022). Active angel investor in crypto and biotech startups.

Sam Altman

Stanford University — studied computer science. Dropped out in 2005 after his sophomore year to found Loopt.

Balaji Srinivasan

Stanford University — BS, MS, PhD in electrical engineering; MS in chemical engineering. One of the most credentialed people in Silicon Valley, which makes his anti-establishment positions slightly more interesting.