{"id":52485,"date":"2026-08-31T13:47:46","date_gmt":"2026-08-31T13:47:46","guid":{"rendered":"https:\/\/volity.io\/blog\/bitcoin-78000-cronos-exploit-2\/"},"modified":"2026-09-01T11:24:14","modified_gmt":"2026-09-01T11:24:14","slug":"bitcoin-78000-cronos-exploit","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/actualites\/bitcoin-78000-cronos-exploit\/","title":{"rendered":"Le Bitcoin atteint $78 000 alors que Cronos gele apres un exploit DeFi de $75 millions"},"content":{"rendered":"<h2>Un mois d&rsquo;ao\u00fbt flamboyant pour le bitcoin, une cha\u00eene fig\u00e9e par la peur<\/h2>\n\n<p>Le bitcoin a termin\u00e9 le mois d&rsquo;ao\u00fbt pr\u00e8s de <b>$78 000<\/b>, au terme de son meilleur mois depuis pr\u00e8s de dix ans.<\/p>\n\n<p>Le jeton a progress\u00e9 d&rsquo;environ <b>24 %<\/b> sur la p\u00e9riode, sa meilleure performance d&rsquo;ao\u00fbt depuis 2017.<\/p>\n\n<p>Dans le m\u00eame temps, Cronos a interrompu la production de blocs apr\u00e8s une attaque pr\u00e9sum\u00e9e de $75 millions visant Tectonic, son principal protocole de pr\u00eat.<\/p>\n\n<p>Le contraste compte. La structure de march\u00e9 du bitcoin para\u00eet plus solide, tandis que la plomberie la plus fragile de la DeFi reste cruellement expos\u00e9e.<\/p>\n\n<h2>La demande pour le bitcoin ignore un contexte plus rude<\/h2>\n\n<p>La progression du bitcoin est intervenue alors que les prix du p\u00e9trole montaient et que les tensions entre Washington et T\u00e9h\u00e9ran s&rsquo;intensifiaient.<\/p>\n\n<p>Historiquement, ce m\u00e9lange aurait d\u00e9stabilis\u00e9 les actifs sp\u00e9culatifs. Pourtant, les acheteurs ont continu\u00e9 d&rsquo;affluer.<\/p>\n\n<p>L&rsquo;explication imm\u00e9diate tient \u00e0 la m\u00e9canique de march\u00e9 plut\u00f4t qu&rsquo;\u00e0 la g\u00e9opolitique.<\/p>\n\n<ul>\n  <li><b>Demande pour les ETF au comptant :<\/b> les ETF bitcoin am\u00e9ricains ont absorb\u00e9 environ $2,8 milliards d&rsquo;argent frais net en ao\u00fbt.<\/li>\n  <li><b>Rachats de positions vendeuses :<\/b> le passage du bitcoin au-dessus de $70 000 a contraint les traders baissiers \u00e0 racheter leurs positions.<\/li>\n  <li><b>Retour de la liquidit\u00e9 :<\/b> la liquidit\u00e9 on-chain a augment\u00e9 d&rsquo;environ $4,6 milliards apr\u00e8s un d\u00e9but d&rsquo;\u00e9t\u00e9 calme.<\/li>\n<\/ul>\n\n<p>Les \u00e9metteurs d&rsquo;ETF doivent acheter du bitcoin lorsque les investisseurs apportent des liquidit\u00e9s. Des flux entrants r\u00e9guliers peuvent donc renforcer un march\u00e9 d\u00e9j\u00e0 haussier.<\/p>\n\n<p>Cette boucle de r\u00e9troaction a chang\u00e9 la nature des rallyes. L&rsquo;ancien march\u00e9 crypto reposait largement sur l&rsquo;effet de levier offshore et l&rsquo;enthousiasme des particuliers.<\/p>\n\n<p>D\u00e9sormais, des fonds r\u00e9gul\u00e9s peuvent alimenter une demande persistante pendant les heures de cotation de New York.<\/p>\n\n<p>La vigueur du mois d&rsquo;ao\u00fbt ne garantit toutefois pas un mois de septembre calme. Le bitcoin a souvent pein\u00e9 en septembre, m\u00eame apr\u00e8s des \u00e9t\u00e9s puissants.<\/p>\n\n<p>Les moyennes saisonni\u00e8res montrent de modestes replis en septembre. Or les moyennes offrent peu de r\u00e9confort lorsque l&rsquo;effet de levier s&rsquo;accumule vite.<\/p>\n\n<p>Le bitcoin a gagn\u00e9 pr\u00e8s d&rsquo;un quart en quatre semaines. Les traders qui entrent autour de $78 000 doivent savoir o\u00f9 se situe leur limite de risque.<\/p>\n\n<h2>Cronos s&rsquo;arr\u00eate pendant que Tectonic encaisse le choc<\/h2>\n\n<p>Pendant que le bitcoin montait, Cronos affrontait un probl\u00e8me bien plus \u00e9l\u00e9mentaire : sa cha\u00eene s&rsquo;est arr\u00eat\u00e9e.<\/p>\n\n<p>Les validateurs ont interrompu la production de blocs le 30 ao\u00fbt apr\u00e8s avoir identifi\u00e9 une attaque impliquant Tectonic et son jeton TONIC.<\/p>\n\n<p>Tectonic permet aux utilisateurs de d\u00e9poser des garanties en crypto et d&#8217;emprunter d&rsquo;autres actifs num\u00e9riques. Ce mod\u00e8le \u00e9choue lorsque le prix des garanties peut \u00eatre manipul\u00e9.<\/p>\n\n<p>L&rsquo;attaquant aurait achet\u00e9 de grandes quantit\u00e9s de TONIC sur des pools de n\u00e9gociation peu profonds. L&rsquo;op\u00e9ration a n\u00e9cessit\u00e9 environ $600 000 de capital initial.<\/p>\n\n<p>Le prix du TONIC a ensuite \u00e9t\u00e9 multipli\u00e9 en quelques minutes. Le syst\u00e8me de pr\u00eat de Tectonic a accept\u00e9 ce prix fauss\u00e9 comme authentique.<\/p>\n\n<p>L&rsquo;attaquant a utilis\u00e9 cette garantie TONIC gonfl\u00e9e pour emprunter de l&rsquo;USDC, de l&rsquo;USDT, du WBTC, du WETH et du CRO.<\/p>\n\n<p>Les pertes estim\u00e9es vont de $70 millions \u00e0 $120 millions. Les chiffres proches de <b>$75 millions<\/b> recueillent toutefois le plus large soutien.<\/p>\n\n<ul>\n  <li><b>Capital initial estim\u00e9 :<\/b> environ $600 000<\/li>\n  <li><b>Pertes probables du protocole :<\/b> environ $75 millions<\/li>\n  <li><b>Fonds parvenus sur Ethereum :<\/b> environ $6 millions<\/li>\n  <li><b>Actifs encore d\u00e9tenus sur Cronos :<\/b> environ $60 millions<\/li>\n<\/ul>\n\n<p>Cronos a arr\u00eat\u00e9 la cha\u00eene avant que davantage de fonds ne puissent circuler. Les utilisateurs n&rsquo;ont donc pas pu retirer, d\u00e9poser, liquider ni arbitrer leurs positions.<\/p>\n\n<p>Crypto.com a indiqu\u00e9 que sa plateforme d&rsquo;\u00e9change et son application centralis\u00e9e fonctionnaient normalement. Les fonds des clients sur ces plateformes n&rsquo;ont pas \u00e9t\u00e9 touch\u00e9s.<\/p>\n\n<p>Cette distinction console peu les d\u00e9posants de Tectonic. Leurs actifs restent bloqu\u00e9s dans un r\u00e9seau immobilis\u00e9.<\/p>\n\n<h3>La d\u00e9cision qui suit<\/h3>\n\n<p>Les validateurs de Cronos font d\u00e9sormais face \u00e0 un choix qui touche au plus ancien d\u00e9bat de la crypto.<\/p>\n\n<p>Ils peuvent red\u00e9marrer sans intervenir et laisser les pertes en l&rsquo;\u00e9tat. Ils peuvent aussi placer des adresses sur liste noire ou faire revenir la cha\u00eene en arri\u00e8re.<\/p>\n\n<p>Un retour en arri\u00e8re pourrait r\u00e9cup\u00e9rer les actifs vol\u00e9s. Il remettrait cependant en cause l&rsquo;id\u00e9e que les blockchains publiques restent neutres et irr\u00e9versibles.<\/p>\n\n<p>Ne rien faire comporte un autre co\u00fbt. Les d\u00e9posants pourraient subir de lourdes pertes, tandis que la confiance envers Cronos pourrait se d\u00e9grader davantage.<\/p>\n\n<p>L&rsquo;attaque met aussi en lumi\u00e8re une faiblesse bien connue du cr\u00e9dit en DeFi. Des jetons de gouvernance illiquides ne devraient pas donner acc\u00e8s \u00e0 de vastes r\u00e9serves de garanties liquides.<\/p>\n\n<p>Un jeton peut se n\u00e9gocier \u00e0 un prix spectaculaire pendant quelques minutes. Cela n&rsquo;en fait pas une garantie adapt\u00e9e \u00e0 des millions de dollars.<\/p>\n\n<p>La conception des oracles compte tout autant. Les protocoles ont besoin de flux de prix qui rejettent les mouvements brusques sur des march\u00e9s \u00e9troits et faciles \u00e0 manipuler.<\/p>\n\n<p>Sinon, une petite transaction peut devenir la cl\u00e9 du coffre.<\/p>\n\n<h2>La Russie envisage un march\u00e9 crypto r\u00e9gul\u00e9 de $46 milliards<\/h2>\n\n<p>Ailleurs, l&#8217;empreinte institutionnelle de la crypto continue de s&rsquo;\u00e9tendre. SberCIB Investment Research anticipe une demande int\u00e9rieure importante en Russie.<\/p>\n\n<p>La soci\u00e9t\u00e9 estime qu&rsquo;un march\u00e9 russe r\u00e9gul\u00e9 de n\u00e9gociation crypto pourrait traiter de 3 500 milliards \u00e0 4 000 milliards de roubles la premi\u00e8re ann\u00e9e.<\/p>\n\n<p>Cela \u00e9quivaut \u00e0 environ <b>$46,4 milliards<\/b> au taux de change cit\u00e9.<\/p>\n\n<p>D&rsquo;ici 2029, le volume annuel pourrait approcher $87 milliards. Si cette pr\u00e9vision se v\u00e9rifie, la Russie deviendrait un p\u00f4le de n\u00e9gociation local significatif.<\/p>\n\n<p>La croissance r\u00e9gul\u00e9e apporte toutefois des contraintes en plus des capitaux. Les r\u00e8gles nationales peuvent fa\u00e7onner la liquidit\u00e9, la conservation et les actifs auxquels les traders ont acc\u00e8s.<\/p>\n\n<p>Pour les march\u00e9s mondiaux, des places r\u00e9gul\u00e9es plus nombreuses peuvent approfondir la participation. Elles peuvent aussi rendre les d\u00e9cisions politiques de plus en plus d\u00e9terminantes pour les prix.<\/p>\n\n<h2>Ce que les traders doivent surveiller<\/h2>\n\n<ol>\n  <li><b>Suivez les flux des ETF.<\/b> Des entr\u00e9es soutenues restent le soutien le plus net du bitcoin \u00e0 court terme. Des sorties mettraient \u00e0 l&rsquo;\u00e9preuve la demande r\u00e9elle sous le rallye.<\/li>\n  <li><b>Surveillez l&rsquo;effet de levier.<\/b> Le rachat massif de positions vendeuses en ao\u00fbt a contribu\u00e9 \u00e0 acc\u00e9l\u00e9rer les gains. Des positions acheteuses surcharg\u00e9es pourraient donc amplifier tout retournement.<\/li>\n  <li><b>Distinguez le bitcoin de l&rsquo;exposition \u00e0 la DeFi.<\/b> Un graphique solide du BTC ne rend pas les cha\u00eenes plus petites ni les protocoles de pr\u00eat plus s\u00fbrs.<\/li>\n  <li><b>Interrogez la qualit\u00e9 des garanties.<\/b> Des rendements \u00e9lev\u00e9s peuvent masquer des hypoth\u00e8ses fragiles sur les prix des jetons, la liquidit\u00e9 et les m\u00e9canismes de liquidation.<\/li>\n<\/ol>\n\n<p>Le bitcoin fait actuellement office de centre de gravit\u00e9 de la crypto, attirant les capitaux vers son march\u00e9 le plus profond et le plus r\u00e9gul\u00e9.<\/p>\n\n<p>Cronos apporte pourtant le contrepoint. M\u00eame dans un march\u00e9 en pleine effervescence, un mod\u00e8le de garantie fragile peut arr\u00eater net une cha\u00eene enti\u00e8re.<\/p>\n\n\n<h2 class=\"wp-block-heading volity-related-coverage\">Articles connexes sur Volity<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/volity.io\/fr\/crypto\/how-to-avoid-crypto-scams\/\">Comment \u00e9viter les arnaques crypto : liste de s\u00e9curit\u00e9 pour d\u00e9butants<\/a><\/li>\n<li><a href=\"https:\/\/volity.io\/fr\/trading-platforms-fr\/how-to-choose-a-trading-platform\/\">Comment choisir une plateforme de trading : une liste de v\u00e9rification en 10 points<\/a><\/li>\n<li><a href=\"https:\/\/volity.io\/fr\/trader\/demo-vs-live-trading-account\/\">D\u00e9mo vs compte de trading r\u00e9el : une liste de v\u00e9rification en 7 \u00e9tapes avant de passer en direct<\/a><\/li>\n<li><a href=\"https:\/\/volity.io\/fr\/trader\/position-sizing-risk-per-trade\/\">Comment dimensionner un trade : taille de position et risque par trade pour d\u00e9butants<\/a><\/li>\n<li><a href=\"https:\/\/volity.io\/fr\/trader\/risk-reward-ratio-explained\/\">Ratio risque-rendement expliqu\u00e9 : comment le d\u00e9finir et pourquoi il compte<\/a><\/li>\n<li><a href=\"https:\/\/volity.io\/fr\/actions\/etf-vs-index-fund\/\">ETF vs fonds indiciel : la diff\u00e9rence et lequel choisir<\/a><\/li>\n<\/ul>\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"NewsArticle\",\"headline\":\"Le Bitcoin atteint $78 000 alors que Cronos gele apres un exploit DeFi de $75 millions\",\"datePublished\":\"2026-08-31T13:47:46+00:00\",\"dateModified\":\"2026-08-31T13:47:46+00:00\",\"author\":{\"@type\":\"Person\",\"name\":\"Alexander 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[&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":52459,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"custom_schema":"","footnotes":""},"categories":[223],"tags":[],"class_list":["post-52485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le Bitcoin atteint $78 000 alors que Cronos gele apres un exploit DeFi de $75 millions | Volity<\/title>\n<meta name=\"description\" content=\"BTC termine aout pres de $78 000, son meilleur mois depuis pres d une decennie avec environ 24 pour cent de hausse, tandis que les ETF au comptant\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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