Coinbase, l’une des plus grandes plateformes de cryptomonnaies au monde, a été victime d’un piratage sophistiqué. Face à une demande de rançon de 20 millions de dollars et une fuite de données sensibles, l’entreprise a décidé de retourner la menace contre ses auteurs : elle propose la même somme à quiconque permettra de les identifier.

Donald Trump's crypto company created a digital dollar called USD1, which is now being used by a big investor in Abu Dhabi to help fund a $2 billion deal with Binance, the world's largest crypto exchange. Reuters reports: Stablecoins are an increasingly lucrative cog in global crypto trading. Their issuers typically profit by earning interest from the Treasuries and other assets that underpin them. The value of USD1 in circulation reached about $2.1 billion on Wednesday, according to CoinMarketCap data, making it one of the fastest-growing stablecoins. The identity of its major holders, however, remains unclear. An anonymous cryptocurrency wallet that holds $2 billion worth of USD1 received the funds between April 16 and 29, according to data from crypto research firm Arkham. Reuters could not ascertain the owner of this wallet. Binance founder and former CEO Changpeng Zhao, who was incarcerated in the United States last year after pleading guilty to violating U.S. laws against money laundering, met Zach Witkoff and two other World Liberty co-founders in Abu Dhabi, according to a photo posted on social media site X on Sunday. "It was great to see our friends," in Abu Dhabi, posted Zhao in response to the photo, tagging Witkoff. Zhao, who in 2023 stepped down from his role at Binance as part of a $4.3 billion settlement with the U.S. over the illicit finance charges, remains a major shareholder of Binance. Separately, Zach Witkoff announced that USD1 would be integrated into Tron, the blockchain of Hong Kong-based crypto entrepreneur Justin Sun. Sun is the biggest known investor in World Liberty and an adviser to the venture, according to his social media posts, having poured at least $75 million into the project. Sun was fighting a U.S. securities fraud lawsuit at the time of his first investment in World Liberty. The U.S. Securities and Exchange Commission in February paused its case against him, citing public interest.

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Donald Trump's crypto company created a digital dollar called USD1, which is now being used by a big investor in Abu Dhabi to help fund a $2 billion deal with Binance, the world's largest crypto exchange. Reuters reports: Stablecoins are an increasingly lucrative cog in global crypto trading. Their issuers typically profit by earning interest from the Treasuries and other assets that underpin them. The value of USD1 in circulation reached about $2.1 billion on Wednesday, according to CoinMarketCap data, making it one of the fastest-growing stablecoins. The identity of its major holders, however, remains unclear. An anonymous cryptocurrency wallet that holds $2 billion worth of USD1 received the funds between April 16 and 29, according to data from crypto research firm Arkham. Reuters could not ascertain the owner of this wallet. Binance founder and former CEO Changpeng Zhao, who was incarcerated in the United States last year after pleading guilty to violating U.S. laws against money laundering, met Zach Witkoff and two other World Liberty co-founders in Abu Dhabi, according to a photo posted on social media site X on Sunday. "It was great to see our friends," in Abu Dhabi, posted Zhao in response to the photo, tagging Witkoff. Zhao, who in 2023 stepped down from his role at Binance as part of a $4.3 billion settlement with the U.S. over the illicit finance charges, remains a major shareholder of Binance. Separately, Zach Witkoff announced that USD1 would be integrated into Tron, the blockchain of Hong Kong-based crypto entrepreneur Justin Sun. Sun is the biggest known investor in World Liberty and an adviser to the venture, according to his social media posts, having poured at least $75 million into the project. Sun was fighting a U.S. securities fraud lawsuit at the time of his first investment in World Liberty. The U.S. Securities and Exchange Commission in February paused its case against him, citing public interest.

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Sam Altman's eye-scanning identity project, now called World, officially launched in the U.S. with six in-person registration sites. CNBC reports: Here's how it works: You go up to an Orb, a spherical biometric device, and it spends about 30 seconds scanning your face and iris, then creates and stores a unique "IrisCode" for you verifying that you're a human and that you've never signed up before. Then you get some of the project's cryptocurrency, WLD, for free, and you can use your World ID as a sign-in with integrated platforms, which currently include an open API integration with Minecraft, Reddit, Telegram, Shopify and Discord. Starting Thursday, the company is opening six flagship U.S. retail locations where people can sign up to have their eyeball scanned: Austin, Atlanta, Los Angeles, Nashville, Miami and San Francisco. At an event in San Francisco on Wednesday, the venture announced two high-profile partnerships: Visa will introduce the "World Visa card" this summer, available only to people who have had their irises scanned by World, and the online dating giant Match Group will begin a pilot program testing out World ID and some age verification tools with Tinder in Japan.

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Bitcoin mining has crossed a critical economic threshold, with costs now exceeding market value for most operators. According to data cited by CoinShares, large public mining companies spend over $82,000 to produce a single Bitcoin -- nearly double last quarter's figure -- while smaller operations face even steeper costs of approximately $137,000 per coin. With Bitcoin currently trading around $94,703, the math no longer works for most miners. The economics become particularly challenging in high-electricity-cost regions like Germany, where mining a single coin requires approximately $200,000. Industry analysts suggest larger mining operations are adapting by optimizing energy consumption and positioning their computational infrastructure for alternative uses. These companies can potentially lease their mining setups for other computational tasks during unprofitable mining periods, then resume mining when market conditions improve. For individual miners, however, the era of profitable home operations appears effectively over, as industrial-scale facilities with strategic positioning and optimized technology have fundamentally altered the mining landscape.

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Onchain investigator ZachXBT flagged a suspicious $330.7 million Bitcoin transfer that was quickly laundered into Monero, causing XMR's price to spike by 50%. CoinTelegraph reports: The transaction, reported on April 28, saw funds moved from a potential victim's wallet to the address bc1qcry...vz55g. Following the transfer, the stolen stash was quickly laundered through over six instant exchanges and swapped into privacy-focused cryptocurrency Monero. The large-scale conversion led to a 50% spike in XMR's price with the token reaching an intraday high of $339, according to data from CoinMarketCap. At the time of writing, XMR has settled slightly but remains up 25% in the past 24 hours, trading at $289. When asked whether North Korea's Lazarus Group was behind the attack, ZachXBT dismissed the theory, stating it was "highly probable it's not," suggesting independent hackers were responsible. "While there are concerns of more criminals moving to privacy coins for anonymity, the vast majority of criminal activity still uses mainstream cryptocurrencies, such as Bitcoin, Ethereum and stablecoins," Chainalysis said. "Cryptocurrency is only useful if you can buy and sell goods and services or cash out into fiat, and that is much more difficult with privacy coins, especially as many mainstream exchanges have offboarded the use of privacy coins, such as Monero."

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The head of the Swiss National Bank said on Friday that cryptocurrencies failed to meet the institution's currency reserve standards, rebuffing calls by crypto advocates that it hold bitcoin as a hedge against growing global economic risks. From a report: Cryptocurrency campaigners are ramping up pressure on the SNB to buy bitcoin, arguing that the economic turmoil triggered by U.S. President Donald Trump's tariffs made it more important for the central bank to diversify its reserves. They have launched a referendum campaign to change the Swiss constitution and require the SNB to hold bitcoin in its reserves alongside gold. SNB Chairman Martin Schlegel, however, rejected the idea at the central bank's shareholder meeting in Bern.

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La période des impôts est de retour. Comme chaque année, cette étape obligatoire peut donner des sueurs froides. Entre les plus-values, les plateformes d’échange et les obligations fiscales spécifiques, il est facile de s’y perdre. Mais pas de panique : dans cet article, on vous donne toutes les clés pour déclarer vos actifs numériques sans stress.

A Canadian math prodigy is accused of stealing over $65 million through complex exploits on decentralized finance platforms and is currently a fugitive from U.S. authorities. Despite facing criminal charges for fraud and money laundering, he has evaded capture by moving internationally, embracing the controversial "Code is Law" philosophy, and maintaining that his actions were legal under the platforms' open-source rules. The Globe and Mail reports: Andean Medjedovic was 18 years old when he made a decision that would irrevocably alter the course of his life. In the fall of 2021, shortly after completing a master's degree at the University of Waterloo, the math prodigy and cryptocurrency trader from Hamilton had conducted a complex series of transactions designed to exploit a vulnerability in the code of a decentralized finance platform. The maneuver had allegedly allowed him to siphon approximately $16.5-million in digital tokens out of two liquidity pools operated by the platform, Indexed Finance, according to a U.S. court document. Indexed Finance's leaders traced the attack back to Mr. Medjedovic, and made him an offer: Return 90 per cent of the funds, keep the rest as a so-called "bug bounty" -- a reward for having identified an error in the code -- and all would be forgiven. Mr. Medjedovic would then be free to launch his career as a white hat, or ethical, hacker. Mr. Medjedovic didn't take the deal. His social media posts hinted, without overtly stating, that he believed that because he had operated within the confines of the code, he was entitled to the funds -- a controversial philosophy in the world of decentralized finance known as "Code is Law." But instead of testing that argument in court, Mr. Medjedovic went into hiding. By the time authorities arrived on a quiet residential street in Hamilton to search his parents' townhouse less than two months later, Mr. Medjedovic had moved out, taking his electronic devices with him. Then, roughly two years later, he struck again, netting an even larger sum -- approximately $48.4-million -- by conducting a similar exploit on another decentralized finance platform, U.S. authorities allege. Mr. Medjedovic, now 22, faces five criminal charges -- including wire fraud, attempted extortion and money laundering -- according to a U.S. federal court document that was unsealed earlier this year. If convicted, he could be facing decades in prison. First, authorities will have to find him.

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Circle, the issuer of the USDC stablecoin, has filed for an IPO aiming for a $5 billion valuation. It marks the company's second attempt at going public amid renewed momentum in the crypto sector and signs of recovery in tech IPO markets. CNBC reports: A prior merger with a special purpose acquisition company (SPAC) collapsed in late 2022 amid regulatory challenges. Since then, Circle has made strategic moves to position itself closer to the heart of global finance, including the announcement last year that it would relocate its headquarters from Boston to One World Trade Center in New York. Circle reported $1.68 billion in revenue and reserve income in 2024, up from $1.45 billion in 2023 and $772 million in 2022. The company reported net income last year of about $156 million., down from $268 million a year earlier. A successful IPO would make Circle one of the most prominent pure-play crypto companies to list on a U.S. exchange. Coinbase went public through a direct listing in 2021 and has a market cap of about $44 billion.

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With America's national debt sitting comfortably over the $36.2 trillion mark, BlackRock CEO Larry Fink is warning the burden could one day be the reason the dollar is dethroned as the reserve currency of the world. From a report: He argues that decentralized currencies like Bitcoin could replace the dollar as worldwide organizations lose faith in national currencies and seek an independent solution. Fink explained his theory in his 2025 letter to shareholders, writing: "The U.S. has benefited from the dollar serving as the world's reserve currency for decades. But that's not guaranteed to last forever. "The national debt has grown at three times the pace of GDP since Times Square's debt clock started ticking in 1989. This year, interest payments will surpass $952 billion -- exceeding defense spending. By 2030, mandatory government spending and debt service will consume all federal revenue, creating a permanent deficit. If the U.S. doesn't get its debt under control, if deficits keep ballooning, America risks losing that position to digital assets like Bitcoin."

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The Federal Deposit Insurance Corporation (FDIC) says banks no longer need prior approval before engaging in crypto-related activities, such as holding digital currency assets or partnering with companies in the industry. Axios reports: After publishing a general caution against banks participating in the industry just two years ago, the FDIC is the latest Trump administration regulator to change its tune entirely amid the president's warm embrace of crypto. "With today's action, the FDIC is turning the page on the flawed approach of the past three years," FDIC acting chairman Travis Hill said in a statement. The OCC was the first of those regulators to revise their guidance, telling banks it supervises earlier this month that they no longer need permission to engage in certain common cryptocurrency-related activities. The Fed as of Friday had not issued any update, though chair Jerome Powell told lawmakers during a congressional hearing last month that the central bank would take a fresh look at the guidance. The new policy clarifies that "FDIC-supervised institutions may engage in permissible activities, including ... digital assets, provided that they adequately manage the associated risks."

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According to the Financial Times, Fidelity Investments is in advanced stages of developing its own stablecoin. Binance reports: The Boston-based financial services giant plans for the token to serve as a form of digital cash, according to the report, which cites two people close to the matter. The token would form part of company's strategy to enter the tokenized government bonds market. Stablecoins are a cryptocurrency whose value is pegged to a real-world asset such as the U.S. dollar or gold. They provide a convenient way for crypto traders to preserve their fiat value without having to cash out of the market. The news emerges just days after Fidelity filed paperwork to register a blockchain-based version of its U.S. dollar money market fund. The company seeks to register an "OnChain" share class of its Treasury Digital Fund (FYHXX), which holds cash and U.S. Treasury securities and is available only to Fidelity's hedge fund and institutional clients. A Fidelity stablecoin could fill the role of cash in this fund. The report comes a day after World Liberty Financial, a crypto venture backed by Donald Trump and his family, launched a U.S. dollar-pegged stablecoin called USD1.

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GameStop announced it will invest part of its corporate cash in bitcoin and stablecoins, following MicroStrategy's lead. The meme stock jumped more than 6% in extended trading Tuesday following the news. CNBC reports: The video game retailer said a portion of its cash or future debt and equity issuances may be invested in bitcoin and U.S. dollar-denominated stablecoins. As of Feb. 1, GameStop held nearly $4.8 billion in cash. The firm also said it has not set a ceiling on the amount of bitcoin it may purchase. The company said the move could expose it to volatility associated with cryptocurrency prices. "Bitcoin, for example, is a highly volatile asset and has experienced significant price fluctuations over time. Our Bitcoin strategy has not been tested and may prove unsuccessful," GameStop said in a U.S. Securities and Exchange Commission filing.

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World Liberty Financial, a crypto venture backed by Donald Trump and his family, has launched a U.S. dollar-pegged stablecoin called USD1. The token is backed by U.S. Treasuries and cash equivalents and will soon go live on the Ethereum and Binance Smart Chain networks. CNBC reports: The development comes as the market cap for dollar-backed stablecoins -- cryptocurrencies that promise a fixed value peg to another asset -- has been climbing to new all-time-highs this year and has grown more than 46% in the past year, according to CryptoQuant. The market has long been dominated by Tether (USDT) and, more recently, Circle's USDC. "USD1 provides what algorithmic and anonymous crypto projects cannot -- access to the power of DeFi underpinned by the credibility and safeguards of the most respected names in traditional finance," said World Liberty Financial co-founder Zach Witkoff. "We're offering a digital dollar stablecoin that sovereign investors and major institutions can confidently integrate into their strategies for seamless, secure cross-border transactions." Alex Thorn is head of firmwide research at Galaxy Digital, said at the Digital Asset Summit: "Stablecoins are seen as more politically easy to do in Congress but actually will be dramatically more impactful to the United States and the world than market structure [legislation]. Who regulates who is important ... if you're one of the people that's going to be regulated, but the stablecoin bill could solidify dollar dominance for 100 years."

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