Wallet

Ledger CTO Charles Guillemet warned that Elliptic Curve Cryptography underpinning blockchain keys could be compromised by sufficiently powerful quantum computers, and said preparation must begin well before such capability arrives. On February 27, 2026, he described post quantum experiments inside secure elements, while experts caution that about seven million BTC, including roughly one million linked to Satoshi Nakamoto, could be exposed.

On February 27, 2026, up to eight major wallets on Polymarket's ZachXBT prediction market were flagged for unusually large gains after backing Axiom. The market drew over $39M in volume, with 3,630 wallets participating and early odds near 15% enabling outsized profits; one leading wallet bridged USDC to Ethereum.

At the XRP Australia 2026 event in Sydney on Friday, Coinbase’s John O'Loghlen said Australia is seeing regulatory momentum and expanding institutional access through Bitcoin and Ether ETFs launched in June 2024 and October 2024. OKX’s Kate Cooper highlighted rising SMSF participation, while an Independent Reserve 2025 report showed crypto adoption at 31%, up from 28% in 2024.

Tether invested $200 million in Whop at a $1.6 billion valuation, aiming to move stablecoin use beyond exchanges and into digital marketplaces. Whop will integrate Tether's Wallet Development Kit to support USDT and USAT payments with self-custodial wallets and on-chain settlement. The deal targets creators and software vendors seeking dollar-denominated payments without reliance on card networks.

On 25 February 2026, researchers reported an active malware campaign using fake Windows 11 upgrade ads on Facebook to compromise cryptocurrency users. The scheme redirects victims to Microsoft-style clone sites that deliver a malicious installer hiding the "LunarApplication" infostealer. Once executed, the malware targets wallet seed phrases, exchange credentials, and saved passwords while using geofencing and sandbox checks to evade security tools.

Stripe said in an annual letter on Tuesday that it signed agreements with investors to run a tender offer providing liquidity for current and former employees, valuing the company at $159 billion. The letter also reported $1.9 trillion in 2025 customer payment volume, up 34% year over year, and noted its revenue suite is on track for a $1 billion annual run rate this year.

Ethereum co-founder Vitalik Buterin has proposed using transaction simulations and related tools to better align onchain execution with user intent. In a recent post on X, he suggested that users first define the action they want to take and then approve or cancel after viewing a simulated outcome, supported by mechanisms like spending caps and multisig checks. He argued that while user intent is inherently complex and perfect security is unattainable, overlapping ways of expressing intent can make low-risk actions easier and high-risk actions more difficult.

In the week just concluded, the Shiba Inu team launched the SOU (Shib Owes You) NFT initiative to help users affected by last September's Shibarium hack. Following this, Shibarium-focused account Susbarium and team member Lucie warned that scammers are creating fake SOU portals and phishing links to drain wallets. Users are being reminded that SOU NFTs will not be airdropped and can only be claimed via the official SHIB website, and that they should avoid suspicious links and never share private keys or seed phrases.

According to Arkham, Vitalik Buterin holds more than 240,000 ETH worth about $467 million and ranks as the largest accessible individual holder. In late January 2026 he withdrew 16,384 ETH, followed by sales totaling around 2,961 ETH over three days in early February routed via CoW Protocol.

An Ethereum developer detailed how ERC-5564 enables native stealth addresses using public meta-addresses and one-time destinations to keep wallets and histories private. The design introduces viewing and spending keys, plus optional delegation for payment scanning. He also noted gas requirements for fresh addresses and potential spam-triggered scans, with sender-included ETH and filters proposed as mitigations.