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Whether to buy cryptocurrency as a long-term holding may be the biggest decision an investor interested in digital assets has to make, but where to store crypto like bitcoin can become the most consequential.

Following the wildfires earlier this year in California, social media posts began to appear with claims of bitcoin losses, with some users showing metal plates intended to protect seed phrases burnt up and illegible or describing the complexity of recovering crypto keys stored in a safety deposit box in a bank impacted by the fires. While impossible to verify individual claims about fires consuming hard drives, laptops and other storage devices containing so-called hard and cold storage crypto wallets and seed phrases, what is certain is that bitcoin self-custody presents a unique set of security issues. And those risks are growing.

Holders of crypto typically use some form of what can be called a “wallet,” and there are a few main features – whether that wallet is connected to the internet, and how much control is directly embedded in the wallet for trades and transfers. There is also the underlying issue of whether a crypto investor uses a third party for custody at all, or maintains total custody and trading control over their holdings.

The standard third-party platform “hot wallet” – think of an offering from a Coinbase or Blockchain.com – is constantly connected to the internet. Cold storage and “cold wallets,” on the other hand, include hardware devices (like a USB stick) that holds private keys offline, or even just a seed phrase (a master recovery code, a collection of 12 to 24 words used to recover access to a crypto wallet) on paper/metal. Hardware wallets or offline backups of seed phrases can be used to access crypto when connected to the internet through another device.

With third-party custodial options, there are steps to help owners remain vigilant against the threat posed by cybercriminals who can gain access to an internet-connected platform, including the use of two-factor authentication, and strong passwords. The U.S. Marshals Service within the Department of Justice, which is responsible for asset forfeiture from U.S. law enforcement, uses Coinbase Prime to provide custody for its seized digital assets.

Many crypto bulls prefer to self-custody digital assets like bitcoin for some of the same reasons they are interested in cryptocurrencies to begin with: lack of faith in some forms of institutional control. Custodial wallets from crypto brokers trade convenience for the risk of exchange hacks, shutdowns, or fraud, as in the case of the high-profile implosion of FTX. And the wildfires are just one example in a recent string of global events that raise more questions about shifts in the crypto custody debate. There is the ongoing conflict in the Middle East and Russia-Ukraine war, which has led crypto bulls from overseas to re-think their approach to self-custody.

Nick Neuman, co-founder and CEO of self-custody company Casa, said physical risks in the world like a natural disaster are an opportunity to revisit how bitcoin security works, and the common security lapses folded into most peoples’ practices. “Most people secure their bitcoin with one private key. If that key is on a single device or written down on paper as a seed phrase, it’s a single point of failure. If you lose that key, your bitcoin is gone,” he said.

It should be obvious that keeping seed phrases on paper offers the lowest level of protection against fire, yet it is common practice, Neuman said. Slipping these pieces of paper into fireproof bags or safes offer some protection, but not much, and even going the extra steps to have the seed phrases on “indestructible” metal storage plates presents a few failure points. For one, they might prove to be not so indestructible, and second, they may be impossible to locate amid the rubble. 

“Logically, given the location of the fires in California and the stories being shared on X, it’s highly likely bitcoin was lost,” said Neuman. “Some of them are pretty convincing,” he said.

Casa performs annual stress tests on seed phrase backups.

Some self-custody services, like Casa, offer multi-signature setups that reduce the risks of single-point failure. A multi-key crypto “vault” can include mobile phone keys, multiple hardware keys, and a recovery key that a company likes Casa holds on an owner’s behalf.

The multi-sig custody approach allows an owner to hold a majority of keys while a trusted partner holds a minority of keys. John Haar, managing director at Swan Bitcoin, says that in such a setup, the owner would need to lose all the physical devices and all copies of the seed phrases at the same time. As long as the owner can access at least one device or one seed phrase, they would be able to recover their bitcoin. This approach should significantly limit the potential for all of the devices to be lost in an event like a natural disaster, Haar said.

“You can spread these keys across multiple regions or even countries, and you need any three of the five keys to approve a bitcoin transaction,” Neuman said of Casa’s five-key approach.

Jordan Baltazor, chief administrative officer at Fortress Trust, a regulated crypto custodian, says best practices that we use in other areas of personal life should apply to cryptocurrency. For one, diversification of storage approach and weighing of risks. Digital assets are no different, he says, when it comes to backing up personal and sensitive data on the cloud to ensure data against loss or corruption.

Companies including Coinbase and Jack Dorsey’s Block offer products that try to merge some of these ideas, creating a more secure version of a crypto wallet that remains convenient to use. There is Coinbase Vault, which includes enhanced security steps before a user can access crypto holdings for trading. And there is Coinbase Wallet and Block’s Bitkey, which have mobile apps that work like a traditional wallet making moving bitcoin around easy, but with the ability to pair with hardware wallets and added security more commonly associated with cold storage.

Bitkey hardware requires multiple authorizations for transactions for added security, similar to “multi-sig wallets.” Bitkey also offers recovery tools so one of the biggest risks of self-custody — losing codes or phrases needed to recover a cold wallet — is less of an issue.

Solutions like Dorsey’s may help to solve the tension between convenience and security; at minimum, they underline that this tension exists and will likely be something of a roadblock to more widespread crypto adoption. Beyond the risks out there in the form of wildfires, all kinds of natural disasters, and wars, bitcoin self-custody can be vulnerable to the biggest personal risk of all: unexpected death of the bitcoin owner. There is arguably nothing more complicated than inheritance when it comes to unlocking the crypto chain of custody.

Coinbase requires probate court documents and specific will designations before releasing funds from custody, while physical wallets offer little to no support, potentially leaving all that digital value stuck on a private key. Bitkey rolled out its inheritance solution in February for what a Bitkey executive called, “kind of a multibillion-dollar problem waiting to happen.”

“People who have a material investment in bitcoin absolutely need to be thinking differently about how to protect it,” Neuman said. He says that after disasters like the California wildfires, or when exchanges go bust like FTX, the industry does see more crypto holders taking action to move to more secure storage setups. “I suppose it’s human nature to wait until ‘bad things happen’ to spur action to improve your own personal situation,” he said. “But I think people would be better off if they were more proactive. Otherwise, they risk having that ‘bad thing’ happen to them, and then it’s too late,” he said.

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Google promotes ‘AI Mode’ on home page ‘Doodle’

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Google promotes ‘AI Mode’ on home page 'Doodle'

Google CEO Sundar Pichai addresses the crowd during Google’s annual I/O developers conference in Mountain View, California on May 20, 2025.

Camille Cohen | AFP | Getty Images

The Google Doodle is Alphabet’s most valuable piece of real estate, and on Tuesday, the company used that space to promote “AI Mode,” its latest AI search product.

Google’s Chrome browser landing pages and Google’s home page featured an animated image that, when clicked, leads users to AI Mode, the company’s latest search product. The doodle image also includes a share button.

The promotion of AI Mode on the Google Doodle comes as the tech company makes efforts to expose more users to its latest AI features amid pressure from artificial intelligence startups. That includes OpenAI which makes ChatGPT, Anthropic which makes Claude and Perplexity AI, which bills itself as an “AI-powered answer engine.”

Google’s “Doodle” Tuesday directed users to its search chatbot-like experience “AI Mode”

AI Mode is Google’s chatbot-like experience for complex user questions. The company began displaying AI Mode alongside its search results page in March.

“Search whatever’s on your mind and get AI-powered responses,” the product description reads when clicked from the home page.

AI Mode is powered by Google’s flagship AI model Gemini, and the tool has rolled out to more U.S. users since its launch. Users can ask AI Mode questions using text, voice or images. Google says AI Mode makes it easier to find answers to complex questions that might have previously required multiple searches.

In May, Google tested the AI Mode feature directly beneath the Google search bar, replacing the “I’m Feeling Lucky” widget — a place where Google rarely makes changes.

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How a beer-making process is used to make cleaner disposable diapers

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How a beer-making process is used to make cleaner disposable diapers

Clean Start: Startup focuses on making diapers renewable

Disposable diapers are a massive environmental offender. Roughly 300,000 of them are sent to landfills or incinerated every minute, according to the World Economic Forum, and they take hundreds of years to decompose. It’s a $60 billion business.

One alternative approach has been compostable diapers, which can be made out of wood pulp or bamboo. But composting services aren’t universally available and some of the products are less absorbent than normal nappies, critics say.

A growing number of parents are also turning to cloth diapers, but they only make up about 20% of the U.S. market.

ZymoChem is attacking the diaper problem from a different angle. Harshal Chokhawala, CEO of ZymoChem, said that 60% to 80% of a typical diaper consists of fossil-based plastics. And half of that is an ingredient called super absorbent polymer, or SAP.

“What we have created is a low carbon footprint bio-based and biodegradable version of this super absorbent polymer,” Chokhawala said.

ZymoChem, with operations in San Leandro, California, and Burlington, Vermont, invented this new type of absorbent by using a fermentation process to convert a renewable resource — sugar — from corn into biodegradable materials. It’s similar to making beer.

“We’re at a point now where we’re very close to being at cost parity with fossil based manufacturing of super absorbents,” said Chokhawala.

The company’s drop-in absorbents can be added into other diapers, which makes it different from environmentally conscious companies like Charlie Banana, Kudos and Hiro, which sell their own brand of diapers.

ZymoChem doesn’t yet have a diaper product on the market. But Lindy Fishburne, managing partner at Breakout Ventures and an investor in the company, says it’s a scalable model.

“Being able to build and grow with biology allows us to unlock a circular economy and a supply chain that is no longer petro-derived, which opens up the opportunities of where you can manufacture and how you secure supply chains,” Fishburne said.

Other investors include Toyota Ventures, GS Futures, KDT Ventures, Cavallo Ventures and Lululemon.  The company has raised a total of $35 million.

The Lululemon partnership shows that it’s not just about diapers. ZymoChem’s bio-based materials can also be used in other hygiene products and in bio-based nylon. Lululemon recently said it will use it in some of its leggings, which were traditionally made with petroleum.

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Figma files for IPO on NYSE, plans to ‘take big swings’ with acquisitions

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Figma files for IPO on NYSE, plans to 'take big swings' with acquisitions

Dylan Field, co-founder and CEO of Figma, appears at the Bloomberg Technology Summit in San Francisco on May 9, 2024.

David Paul Morris | Bloomberg | Getty Images

Design software company Figma filed for an IPO on Tuesday, and plans to trade on the New York Stock Exchange under ticker symbol “FIG.”

The offering would be one of the hotly anticipated IPOs in recent years given Figma’s growth rate and its high private market valuation. In late 2023, a $20 billion acquisition agreement with Adobe was scrapped due to regulatory concerns in the U.K. That led Adobe to pay Figma a $1 billion termination fee.

Revenue in the first quarter increased 46% to $228.2 million from $156.2 million in the same period a year ago, according to Figma’s prospectus. The company recorded a net income of $44.9 million, compared to $13.5 million a year earlier.

As of March 31, Figma had around 450,000 customers. Of those, 1,031 were contributing at least $100,000 a year to annual revenue, up 47% from a year earlier. Clients include Amazon Web Services, Google, Microsoft and Netflix. More than half of revenue comes from outside the U.S.

Figma didn’t say how many shares it plans to sell in the IPO. The company was valued at $12.5 billion in a tender offer last year, and in April it announced that it had confidentially filed for an IPO with the SEC.

Wall Street banks predicted a rush of IPOs after Donald Trump won the U.S. presidential election in November following a dry spell dating back to late 2021, when soaring inflation and rising interest rates pushed investors out of risky assets. While President Trump’s announcement of sweeping tariffs in April roiled markets and led a number of companies to delay their plans, activity has been picking up of late.

Stablecoin issuer Circle doubled in value in its early June debut and is now up more than sixfold from its IPO price for a market cap of almost $43 billion. Online banking company Chime also debuted in June, following Hinge Health’s IPO in May. Artificial infrastructure provider CoreWeave, which went public in March, jumped 46% in June and has quadrupled since its offering.

Circle would be the largest regulated stablecoin if GENIUS Act passes, says Bernstein's Chhugani

Buy now, pay later company Klarna, based in the U.K., filed for a U.S. IPO in March, as did ticket marketplace StubHub.

Figma was founded in 2012 by CEO Dylan Field, 33, and Evan Wallace, and is based in San Francisco. The company had 1,646 employees as of March 31.

Before establishing Figma, Field spent over two years at Brown University, where he met Wallace. Field then took a Thiel Fellowship “to pursue entrepreneurial projects,” according to the filing. The two-year program that Founders Fund partner Peter Thiel established in 2011 gives young entrepreneurs a $200,000 grant along with support from founders and investors, according to an online description.

Field is the biggest individual owner of Figma, with 56.6 million Class B shares and 51.1% of voting power ahead of the IPO. He said in a letter to investors that it was time for Figma to buck the “trend of many amazing companies staying privately indefinitely.”

Databricks, SpaceX and Stripe are among high-valued companies that are still private.

“Some of the obvious benefits such as good corporate hygiene, brand awareness, liquidity, stronger currency and access to capital markets apply,” he wrote, explaining the decision. “More importantly, I like the idea of our community sharing in the ownership of Figma — and the best way to accomplish this is through public markets.”

Field added that as a public company, investors should “expect us to take big swings,” including through acquisitions. In April Figma bought the assets and team of an unnamed technology company for $14 million, according to the filing.

The IPO will also mark another much-needed win for Silicon Valley venture firms, which are in need of returns after the multi-year slump. Index Ventures is the largest outside shareholder, with a 17% stake before the offering, according to the filing. Greylock owns 16%, Kleiner Perkins controls 14% and Sequoia has a stake of 8.7%.

Figma said it faces “intense competition” and that loss of market share would “adversely affect our business,” but didn’t name any specific competitors.

Over 13 million people use Figma per month, and only one-third of them are designers, according to the filing. In March the company announced Figma Sites, a tool that turns designs into working websites. It’s one of a few new products that diversify the company away from its collaborative service for crafting app and website designs.

As of March 31, Figma had $1.54 billion in cash, cash equivalents and marketable securities.

Using its cash, Figma has begun investing in digital currencies. In 2024, Figma’s board authorized a $55 million investment into a Bitwise Bitcoin exchange-traded fund. As of March 31, the holding was worth $69.5 million, according to the filing. In May, the board approved a $30 million investment in Bitcoin, and Figma spent the money on USD Coin, which is a stablecoin.

Morgan Stanley and Goldman Sachs are leading the deal along with Allen and Co. and JPMorgan Chase.

Correction: A prior version of this story had the incorrect stock exchange in the headline.

— CNBC’s Ari Levy and Jonathan Vanian contributed to this report.

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