JACK DORSEY
Co-founder of Twitter and Block (formerly Square), Bitcoin maximalist
Jack Dorsey co-founded Twitter (the platform that changed how the world communicates), then built Square (now Block) into a $40 billion fintech company, then became so obsessed with Bitcoin that he basically turned Block into a Bitcoin company and renamed it to prove the point. He is either a visionary who sees the future of decentralized money or a tech billionaire who went down a very expensive rabbit hole. Jury is still out.
Net Worth
$5.5 Billion
Nationality
American
Time Horizon
Generational
Risk Appetite
9 / 10
Net Worth Context
- · Still a billionaire — just the quiet kind at the end of the table.
CAREER & BACKGROUND
Jack Dorsey co-founded Twitter in 2006, sending the first tweet ("just setting up my twttr"). He was CEO twice — pushed out in 2008, brought back in 2015, then stepped down again in 2021 before Elon Musk bought the company.
In between, he co-founded Square in 2009 (the little white card reader that let anyone accept credit card payments), which grew into Block Inc. — a financial services ecosystem including Cash App, Square POS, TIDAL (acquired from Jay-Z), and TBD (Bitcoin/Web3 division).
Block has a $40+ billion market cap. Dorsey has become one of the most vocal Bitcoin advocates in tech, investing heavily in Bitcoin personally and through Block, and funding Bitcoin development through his Start Small initiative.
COMPANIES & ROLES
Twitter (co-founder), Block/Square (co-founder and chairman, $40B+ market cap), Cash App, Start Small (philanthropic initiative), Bluesky (initiated the project that became the decentralized social network)
INVESTING STYLE & PHILOSOPHY
Dorsey is a concentrated, conviction-driven investor. His personal portfolio is heavily weighted toward Bitcoin — he has said he believes Bitcoin will become the internet's native currency.
Through Block, he has invested in Bitcoin mining, the Lightning Network, and decentralized identity. Outside of crypto, he invests in early-stage startups through Start Small and has funded various open source and decentralized technology projects.
He does not diversify — he bets big on what he believes in.
THE PLAYBOOK
Risk Approach
Extremely high. Dorsey has made massive concentrated bets throughout his career — building two multi-billion dollar companies simultaneously, going all-in on Bitcoin personally and corporately, and committing $1 billion (28% of his wealth at the time) to COVID relief through Start Small.
He is comfortable with concentrated, conviction-driven risk.
Money Habits
Dorsey is known for an extreme personal routine — ice baths, walking 5 miles to work, extended fasting, meditation retreats in Myanmar. He is not flashy with spending but invests heavily in Bitcoin and philanthropic causes.
He committed $1 billion to Start Small for COVID relief, girls' education, and UBI.
BIGGEST WIN
Block (Square). Building a payments company that grew from a credit card reader to a $40 billion financial ecosystem including Cash App (which alone processes $200+ billion annually).
Cash App became the go-to peer-to-peer payment app for young Americans and a significant revenue driver for Block.
BIGGEST MISTAKE
Twitter. Dorsey was pushed out as CEO twice and never fully controlled the company.
Twitter was chaotic under every leadership regime and was ultimately sold to Elon Musk for $44 billion — less than what many thought it was worth given its cultural influence. Dorsey has expressed regret about how Twitter evolved and the centralized moderation decisions it made.
FINANCIAL PHILOSOPHY
Decentralize everything. Dorsey believes that centralized platforms (including Twitter, which he co-founded) are fundamentally flawed because they concentrate power.
He advocates for open protocols, Bitcoin as a decentralized currency, and decentralized social media (he initiated the Bluesky project). His philosophy is ideological as much as financial.
FAMILY & PERSONAL LIFE
Private about relationships. Based in various locations (has lived in St.
Louis, San Francisco, and traveled extensively). Known for his unusual lifestyle habits.
EDUCATION
New York University (dropped out), Missouri University of Science and Technology (attended briefly).
BOOKS & RESOURCES
Block shareholder letters, Start Small philanthropic reports
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QUOTES (6)
Bitcoin will be the native currency of the internet. Everything we are building at Block is designed around that inevitability.
I co-founded Twitter and Square at the same time. People said you cannot run two companies. I said watch me. They were partially right.
Cash App processes $200 billion a year. We gave millions of people their first bank account. That is financial inclusion, not fintech jargon.
Decentralization is not a technology. It is a philosophy. No single entity should control how people communicate or move money.
The first tweet was just setting up my twttr. Nobody knew it would change how presidents, protesters, and pop stars communicate.
I committed $1 billion to COVID relief — 28% of my wealth at the time. When the world is on fire, sitting on cash is not an option.
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