The 15 problems most likely to mint the next billionaires in 2026 are weight loss, plastic, organ shortages, clean water, AI, energy storage, food, defense tech, internet access, data security, male contraception, space, humanoid robots, hair loss and aging. Some have already produced giants, such as Eli Lilly, which passed $1 trillion in market value in November 2025 on the back of obesity drugs. Others are still wide open.
Fair warning: none of these is easy, and plenty of very smart people with very large budgets are racing you. Prefer to watch? Here is the video version.
1. A weight loss treatment with fewer side effects
The first part of this problem got solved, and it paid off. Tirzepatide (sold as Mounjaro and Zepbound) made up about 56% of Eli Lilly’s 2025 revenue of roughly $65 billion, and the company hit the $1 trillion mark in November 2025.
The opportunity left is the improved version: fewer side effects, no injections, cheaper, less muscle loss, and treatment that people can stay on for life. Pills are the obvious next step. Whoever gets that right takes a piece of a market that is still growing.
2. A viable plastic replacement
We still make a startling amount of plastic, and global talks on a treaty to cut it failed to reach an agreement in Geneva in 2025. That leaves the field open for a material that is as cheap, as practical and as easy to scale as plastic, and that does not stick around for centuries.
Seaweed, fungi, corn and hemp have all been tried. The sticking point has never been the science. It is the price per kilo at factory scale.
3. Bioprinting and organ printing
More than 100,000 people sit on the US transplant waiting list at any given time, and the supply of donated organs falls short every year. That gap is why printing tissue, from skin for burn patients to bone and eventually working organs, attracts so much research money.
Printed organs for routine transplants are still years away. Specialized pieces, such as skin and cartilage, are closer. The company that gets one of them approved at scale will not need a pitch deck.
4. Water scarcity
Roughly 2.1 billion people still lack safely managed drinking water, according to the most recent UN-backed estimates. Only about 3% of the planet’s water is fresh, and much of that is locked in ice.
The money is in making every liter go further: smarter household metering, better sewage treatment, reuse for farming (agriculture is the biggest water user by far) and cheaper desalination. Beef alone takes around 15,400 liters per kilo, so food and water are really one problem.
5. Artificial intelligence
When we first wrote this list, AI was a promise. Now Nvidia, the company selling the chips, has passed $5 trillion in market value, and OpenAI was valued at around $500 billion in a late 2025 share sale.
The big model-building spots are taken by companies with billions to burn. What is open is everything built on top: AI for specific industries, cheaper chips and cheaper energy to run them, and tools that make the technology reliable enough to trust with real work.
We made a video on the jobs automation hits first if you want the dark side.
6. Energy storage
The world is moving to electricity, and the sun does not shine at night. Storage is the piece that makes wind and solar usable around the clock, from home batteries to grid-scale installations such as Tesla’s Megapack.
Roughly 670 million people still have no electricity at all, so cheap storage matters in poorer places as much as in rich ones. Better batteries, with longer range and faster charging, are worth billions to anyone who builds them. The light bulb was not invented by improving the candle.
7. Food production and alternatives
The UN’s food waste index estimated 1.05 billion tonnes of food was wasted in 2022, about 19% of what was available to consumers. That is a pile of money thrown away every year, and also a pile of resources.
The real fix is producing more food with less water, grain and land. Alternative proteins are part of the answer. Insects need far fewer resources than cattle, though several high-profile insect-farming startups have struggled, which shows how hard it is to make the economics work.
8. Defense technology
War has gone digital. Drones, cyber attacks and software-driven targeting matter as much as tanks, and governments are buying accordingly. Anduril, founded in 2017, was valued at around $30.5 billion in 2025.
The same tools that protect a country can be turned on its information systems. A well-timed ad campaign can sway an election, and Cambridge Analytica only got caught. Defense is a business with a single customer type and very deep pockets.
9. Internet for everybody
By 2025, about 6 billion people were online, roughly three quarters of humanity, up from 51% when we wrote the first version of this list. The remaining quarter is mostly in the poorest and most remote places.
Starlink has brought satellite internet to millions of customers, and SpaceX went public in June 2026 at a reported valuation of about $1.77 trillion. Reaching the last billion people cheaply is still unfinished business.
10. Private data and security
Security is a huge industry, and in March 2025 Google agreed to buy cloud security startup Wiz for $32 billion in cash, a deal that closed in March 2026. That tells you what a good idea in this space is worth.
The consumer side is still underserved. Most of us keep our whole lives on phones and laptops with weak protection, and breaches like the 2017 Equifax hack, which exposed data on 143 million people, keep happening. A product that keeps ordinary users safe without ruining their day would find a big audience.
11. Male birth control
Contraception is a massive market that is almost entirely built around women. Several male options are in human trials, including a hormone gel and non-hormonal pills, but none is approved.
A safe, reversible product with no real side effects would reach half the population that has had to rely on condoms and vasectomies. The hold-up is clinical: getting through trials and persuading regulators.
12. Space exploration and resource capture
This one has moved from fantasy to financial filings. SpaceX’s Starship reached sustained orbit on its 14th flight in September 2026, and the company went public in June 2026. Launch costs are the main barrier, and they are falling.
US law since 2015 gives companies ownership of space resources they extract. Asteroid mining is still a long way off, but satellites, launch services and space infrastructure already make money today.
13. Humanoid robots
We used to list a different robotics idea here, and the real action turned out to be elsewhere. Humanoid robots built for factories and warehouses now draw serious money. Figure AI was valued at about $39 billion in September 2025, and Tesla is working on its Optimus robot.
Whoever makes a robot that does useful work reliably, safely and at a price a business can afford will have a very long line of buyers. Home robots come after that.
14. Hair regeneration
Millions of people pay for hair transplants, wigs and treatments such as minoxidil and finasteride. None of them grow back a full head of hair on demand.
A cream, laser or injection that safely regrows hair would sell worldwide. It would also be sold to people who would never admit they were buying it. Our brutal truths video explains why looks matter more than people claim.
15. Aging and death
Longevity research has real money behind it. Altos Labs launched in 2022 with $3 billion in funding, and investors such as Larry Ellison and Peter Thiel have spent heavily on anti-aging science.
Nobody has solved aging. But slowing it, replacing worn-out organs and treating age-related disease are already attracting serious capital. Treat aging like a disease and the market is every person alive.
FAQ
Which problem has already made the most money?
Weight loss. Eli Lilly became the first health-care company to hit a $1 trillion market value in November 2025, driven mostly by obesity and diabetes drugs.
Which of these problems is easiest to start on?
Software-led ones such as data security and AI applications need the least capital. Space, organ printing and robotics need far more.
What changed since the first version of this list?
AI and weight loss became trillion-dollar categories. We replaced the old robotics entry with humanoid robots and updated the internet, water and security numbers.
Do I need to be rich to work on these?
Not for all of them. Several, such as space and organ printing, usually need serious backing, while software-based ideas can start small.
How was this list put together?
We picked large, unresolved problems and checked recent company valuations, deals and public data.
How we put this list together
We picked problems that affect huge numbers of people and checked each against recent company valuations, acquisition prices and public statistics. Figures are rounded and come from company announcements and international organizations.
Last updated: October 2026.
