{"id":63343,"date":"2021-10-26T16:38:00","date_gmt":"2021-10-26T16:38:00","guid":{"rendered":"https:\/\/fr.cryptonews.com\/?p=63343"},"modified":"2023-06-26T11:07:15","modified_gmt":"2023-06-26T11:07:15","slug":"another-research-on-bitcoin-concentration-omits-important-details-fr","status":"publish","type":"post","link":"https:\/\/cryptonews.com\/fr\/news\/another-research-on-bitcoin-concentration-omits-important-details-fr\/","title":{"rendered":"Cette \u00e9tude sur la concentration du Bitcoin (BTC) omet des d\u00e9tails importants"},"content":{"rendered":"<p>Un document de recherche affirme que Bitcoin (BTC) est concentr&eacute; entre &#8220;quelques mains&#8221;, les 10 000 premiers d&eacute;tenteurs individuels contr&ocirc;lant un tiers des pi&egrave;ces en circulation. Cependant, les membres de la communaut&eacute; Bitcoin soulignent que les conclusions de cette recherche sont trompeuses.<\/p><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/news\/63314\/34594\/webp-net-resizeimage.jpg\" alt=\"\" srcset=\"https:\/\/cimg.co\/news\/63314\/34594\/responsive-images\/webp-net-resizeimage___media_library_original_1200_800.jpg 1200w, https:\/\/cimg.co\/news\/63314\/34594\/responsive-images\/webp-net-resizeimage___media_library_original_900_600.jpg 900w, https:\/\/cimg.co\/news\/63314\/34594\/responsive-images\/webp-net-resizeimage___media_library_original_720_480.jpg 720w, https:\/\/cimg.co\/news\/63314\/34594\/responsive-images\/webp-net-resizeimage___media_library_original_600_400.jpg 600w, https:\/\/cimg.co\/news\/63314\/34594\/responsive-images\/webp-net-resizeimage___media_library_original_300_200.jpg 300w\" sizes=\"100vw\" width=\"1200\" class=\"content-img\"><figcaption>Source: Adobe\/terovesalainen<\/figcaption><\/figure><p>Selon un <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.nber.org\/system\/files\/working_papers\/w29396\/w29396.pdf\">document<\/a> r&eacute;dig&eacute; par deux chercheurs du <strong>National Bureau of Economic Research<\/strong> (NBER), un organisme de recherche priv&eacute; am&eacute;ricain &agrave; but non lucratif, l&#8217;&eacute;cosyst&egrave;me Bitcoin est &#8220;toujours domin&eacute; par des acteurs importants et concentr&eacute;s, qu&#8217;il s&#8217;agisse de grands mineurs, de d&eacute;tenteurs de bitcoins ou d&#8217;exchanges&#8221;.<\/p><p>&#8220;Cette concentration inh&eacute;rente rend le Bitcoin susceptible de pr&eacute;senter un risque syst&eacute;mique et implique &eacute;galement que la majorit&eacute; des gains r&eacute;sultant d&#8217;une adoption plus pouss&eacute;e sont susceptibles de retomber de mani&egrave;re disproportionn&eacute;e sur un petit ensemble de participants&#8221;, indique le document du NBER.<\/p><p>Bloomberg a <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/twitter.com\/crypto\/status\/1452890502991392774\">d&eacute;clar&eacute;<\/a> sur Twitter que &#8220;les 1 000 premiers investisseurs individuels contr&ocirc;lent environ 3 millions de bitcoins, et la concentration pourrait &ecirc;tre encore plus grande.&#8221;<\/p><p>En r&eacute;ponse &agrave; ces affirmations, <strong>Nic Carter<\/strong>, cofondateur de <strong>Coin Metrics<\/strong> et partenaire fondateur de <strong>Castle Island Ventures<\/strong>, s&#8217;est employ&eacute; &agrave; d&eacute;mystifier l&#8217;id&eacute;e que les avoirs en BTC sont aussi concentr&eacute;s aujourd&#8217;hui qu&#8217;ils l&#8217;&eacute;taient aux d&eacute;buts de Bitcoin.<\/p><p>&#8220;Regardez le nombre croissant d&#8217;adresses contenant une quantit&eacute; x de bitcoins et il est ind&eacute;niable que l&#8217;offre est de plus en plus dispers&eacute;e&#8221;, a d&eacute;clar&eacute; M. Carter, notant que &#8220;la distribution par taille d&#8217;adresse&#8221; montre que les petites adresses obtiennent une part plus importante de l&#8217;offre globale.<\/p><figure class=\"media\"><oembed url=\"https:\/\/twitter.com\/nic__carter\/status\/1452802149017079810\"><\/oembed><\/figure><figure class=\"image\"><a href=\"https:\/\/twitter.com\/nic__carter\/status\/1452796603325194245\" target=\"_blank\" rel=\"noopener \"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"1656\" class=\" lazyload\" data-src=\"https:\/\/cimg.co\/news\/63314\/34585\/screenshot-2021-10-26-at-12-04-03.png\" data-srcset=\"https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_1656_520.png 1656w, https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_1200_376.png 1200w, https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_900_282.png 900w, https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_720_226.png 720w, https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_600_188.png 600w, https:\/\/cimg.co\/news\/63314\/34585\/responsive-images\/screenshot-2021-10-26-at-12-04-03___media_library_original_300_94.png 300w\"><\/a><figcaption>Le coefficient de Gini mesure l&#8217;in&eacute;galit&eacute; dans la distribution de richesse.<\/figcaption><\/figure><p>D&#8217;autres membres de la communaut&eacute; ont fait la m&ecirc;me remarque, un utilisateur <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/twitter.com\/TheRomanHodler\/status\/1452896669238972419?s=20\">d&eacute;clarant<\/a> : &#8220;Article biais&eacute;. Ne mentionne pas la tendance &agrave; la redistribution&#8221;. Dans le m&ecirc;me ordre d&#8217;id&eacute;es, un autre individu a <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/twitter.com\/Johann12316\/status\/1452891254489026561?s=20\">fait remarquer<\/a> que &#8220;la machine &agrave; faire peur aux gens se remet en marche&#8221;.<\/p><p>Le point de vue de Carter a &eacute;galement <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/news\/so-you-re-not-a-bitcoin-whale-but-what-kind-of-btc-sea-creat-9112\/\">fait &eacute;cho<\/a> &agrave; un &eacute;tude de la soci&eacute;t&eacute; d&#8217;analyse on-chain <strong>Glassnode<\/strong> du d&eacute;but de l&#8217;ann&eacute;e qui a d&eacute;clar&eacute; que plut&ocirc;t que d&#8217;affirmer que &#8220;2% des comptes&#8221; poss&egrave;dent 95% de tous les BTC en circulation, le nombre est en fait plus proche de 71%.<\/p><p>&Agrave; l&#8217;&eacute;poque, cette d&eacute;couverte avait conduit le cofondateur et directeur de la technologie de Glassnode, <strong>Rafael Schultze-Kraft<\/strong>, &agrave; affirmer que &#8220;la propri&eacute;t&eacute; des BTC est beaucoup moins concentr&eacute;e que ce qui est souvent indiqu&eacute; dans les m&eacute;dias&#8221;, ajoutant que le rapport prouvait &eacute;galement qu&#8217;elle s&#8217;&eacute;tait en fait &#8220;dispers&eacute;e au fil du temps&#8221;.<\/p><figure class=\"media\"><oembed url=\"https:\/\/twitter.com\/n3ocortex\/status\/1356673243734822912?s=21\"><\/oembed><\/figure><p>Par ailleurs, les affirmations selon lesquelles la grande majorit&eacute; des bitcoins sont concentr&eacute;s entre quelques mains seulement ne devraient pas surprendre le monde de la finance traditionnelle.<\/p><p>CNBC a <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.cnbc.com\/2021\/10\/18\/the-wealthiest-10percent-of-americans-own-a-record-89percent-of-all-us-stocks.html\">r&eacute;v&eacute;l&eacute;<\/a> la semaine derni&egrave;re que les 10 % des personnes les plus riches aux &Eacute;tats-Unis poss&egrave;dent 89 % de toutes les actions cot&eacute;es aux &Eacute;tats-Unis d&eacute;tenues par les m&eacute;nages, tout en notant que ce chiffre &#8220;met en &eacute;vidence le r&ocirc;le du march&eacute; boursier dans l&#8217;accroissement des in&eacute;galit&eacute;s de richesse.&#8221;<\/p><p>&#8220;Les 1% les plus riches poss&egrave;dent beaucoup d&#8217;actions, le reste d&#8217;entre nous en poss&egrave;de un peu&#8221;, avait alors d&eacute;clar&eacute; &agrave; CNBC <strong>Steven Rosenthal<\/strong>, charg&eacute; de mission au <strong>Urban-Brookings tax policy center<\/strong>.<\/p><p>L&rsquo;&eacute;tude du NBER a &eacute;galement not&eacute; que la concentration des mineurs est encore plus forte, et que les 10 % de mineurs les plus importants contr&ocirc;lent 90 % de la capacit&eacute; de minage du Bitcoin, tandis que seulement 0,1 % (environ 50 mineurs) contr&ocirc;lent 50 % de cette capacit&eacute;.<\/p><p>Les chercheurs affirment que la concentration des mineurs rend le Bitcoin &#8220;vuln&eacute;rable &agrave; une attaque de 51 %&#8221;.<\/p><p>Les donn&eacute;es fournies par le pool minier Bitcoin <strong>BTC.com<\/strong> montrent qu&#8217;au cours des trois derniers jours, huit pools (avec plus de 5 % du hashrate chacun) ont contr&ocirc;l&eacute; 91 % du hashrate Bitcoin, ou la puissance de calcul du r&eacute;seau.&nbsp;<\/p><p><strong>Distribution des pools de minage de Bitcoin au cours des 3 dernier jours :<\/strong><\/p><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"662\" class=\" lazyload\" data-src=\"https:\/\/cimg.co\/news\/63314\/34593\/screenshot-2021-10-26-at-15-34-16-mining-pools-bitcoinbtc-btc-com-professional-data-service-for-global-blockchain-ent.png\" data-srcset=\"https:\/\/cimg.co\/news\/63314\/34593\/responsive-images\/screenshot-2021-10-26-at-15-34-16-mining-pools-bitcoinbtc-btc-com-professional-data-service-for-global-blockchain-ent___media_library_original_662_492.png 662w, https:\/\/cimg.co\/news\/63314\/34593\/responsive-images\/screenshot-2021-10-26-at-15-34-16-mining-pools-bitcoinbtc-btc-com-professional-data-service-for-global-blockchain-ent___media_library_original_600_445.png 600w, https:\/\/cimg.co\/news\/63314\/34593\/responsive-images\/screenshot-2021-10-26-at-15-34-16-mining-pools-bitcoinbtc-btc-com-professional-data-service-for-global-blockchain-ent___media_library_original_300_222.png 300w\"><figcaption>Source: BTC.com<\/figcaption><\/figure><p>De plus, apr&egrave;s que la Chine a s&eacute;vi contre les mineurs locaux de BTC au d&eacute;but de l&#8217;ann&eacute;e, le hashrate mondial est d&eacute;sormais <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/news\/us-becomes-largest-bitcoin-mining-hub-after-chinas-miner-exodus-fr\/\">mieux r&eacute;parti<\/a> dans le monde.&nbsp;&nbsp;<\/p><p>Et si, en th&eacute;orie, les mineurs de BTC pourraient coordonner une attaque &agrave; 51 %, cela serait extr&ecirc;mement difficile et co&ucirc;teux. Par exemple, <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.crypto51.app\/\">selon<\/a> les calculs th&eacute;oriques de crypto51.app, une attaque d&#8217;une heure sur le r&eacute;seau Bitcoin co&ucirc;terait pr&egrave;s de 2,7 millions de dollars. De plus, bien que ce type d&#8217;attaque puisse miner la confiance dans le r&eacute;seau et nuire aux mineurs eux-m&ecirc;mes, il ne fait que faciliter la double d&eacute;pense, mais ne permet pas &agrave; l&#8217;attaquant de voler les jetons de tout le monde.<\/p><p><strong>Andreas Antonopoulos discute de la possibilit&eacute; d&#8217;une attaque &agrave; 51% :<\/strong><\/p><figure class=\"media\"><oembed url=\"https:\/\/www.youtube.com\/watch?v=ncPyMUfNyVM\"><\/oembed><\/figure><p>&nbsp;<\/p><p>Suivez nos liens d&#8217;affili&eacute;s:<\/p><p><strong>Pour acheter des cryptomonnaies en Zone SEPA, Europe et citoyens fran&ccedil;ais<\/strong>, visitez <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.coinhouse.com\/r\/179207\">Coinhouse<\/a>&nbsp;<\/p><p><strong>Pour acheter des cryptomonnaies au Canada<\/strong>, visitez <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/go.bitbuy.tech\/aff_c?offer_id=3&amp;aff_id=1009&amp;source=FR\">Bitbuy<\/a><\/p><p><strong>Pour g&eacute;n&eacute;rer des int&eacute;r&ecirc;ts gr&acirc;ce &agrave; vos bitcoins<\/strong>, allez sur le site de <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/blockfi.mxuy67.net\/kqG6x\">BlockFi<\/a><\/p><p><strong>Pour s&eacute;curiser ou stocker vos cryptomonnaies<\/strong>, procurez-vous les portefeuilles <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/shop.ledger.com\/?r=12b53b98a1c0&amp;tracker=CN-FR\">Ledger<\/a> ou <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/shop.trezor.io\/?offer_id=82&amp;aff_id=1814\">Trezor<\/a><\/p><p><strong>Pour transiger vos cryptos de fa&ccedil;on anonyme<\/strong>, installez l&#8217;application <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/go.nordvpn.net\/aff_c?offer_id=252&amp;aff_id=54152&amp;url_id=14818\">NordVPN<\/a><\/p><p><strong>Pour investir dans le minage ou les masternodes :<\/strong><\/p><ul><li>Sur <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/feel-mining.com\/?tracking=1ED831AFAB\">Feel Mining<\/a><\/li><li>Sur <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.just-mining.com\/register?sponsor=aNJ7nRa0m3qvgi6LkMXAZX506\">Just Mining<\/a><\/li><\/ul><p><strong>Pour accumuler des cryptos en jouant :<\/strong><\/p><ul><li>Au poker sur la plateforme de jeux <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/coinpoker.com\/crypto\">CoinPoker<\/a><\/li><li>&Agrave; un fantasy football mondial sur la plateforme <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/sorare.pxf.io\/c\/2102999\/902742\/12209\">Sorare<\/a><br><br><strong>Regardez la derni&egrave;re vid&eacute;o &ldquo;Les 5 actus cryptos de la semaine:<\/strong><\/li><\/ul><figure class=\"media\"><oembed url=\"https:\/\/youtu.be\/JIPj9_ueDbQ\"><\/oembed><\/figure><p>________________<\/p><p>Voici les sources d&rsquo;informations qu&rsquo;on vous propose:<\/p><p><strong>Notre newsletter hebdomadaire gratuite: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.getrevue.co\/profile\/CryptonewsFR\"><strong>https:\/\/www.getrevue.co\/profile\/CryptonewsFR<\/strong><\/a><\/p><p><strong>Notre podcast audio: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.buzzsprout.com\/1111262\"><strong>https:\/\/www.buzzsprout.com\/1111262<\/strong><\/a><\/p><p><strong>Notre cha&icirc;ne YouTube: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.youtube.com\/channel\/UCEu7E2wqP3t3QzAWTWF9weg\"><strong>https:\/\/www.youtube.com\/channel\/UCEu7E2wqP3t3QzAWTWF9weg<\/strong><\/a><\/p><p><strong>Twitter: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/twitter.com\/cryptonews_FR\"><strong>https:\/\/twitter.com\/cryptonews_FR<\/strong><\/a><\/p><p><strong>Instagram: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.instagram.com\/fr_cryptonews\"><strong>https:\/\/www.instagram.com\/fr_cryptonews<\/strong><\/a><\/p><p><strong>Facebook: &nbsp;<\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.facebook.com\/cryptonewsFR\"><strong>https:\/\/www.facebook.com\/cryptonewsFR<\/strong><\/a><\/p><p><strong>Telegram: <\/strong><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/t.me\/cryptonews_FR\"><strong>https:\/\/t.me\/cryptonews_FR<\/strong><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Un document de recherche affirme que Bitcoin (BTC) est concentr&eacute; entre &#8220;quelques mains&#8221;, les 10 000 premiers d&eacute;tenteurs individuels contr&ocirc;lant un tiers des pi&egrave;ces en circulation. Cependant, les membres de la communaut&eacute; Bitcoin soulignent que les conclusions de cette recherche sont trompeuses.Source: Adobe\/terovesalainenSelon un document r&eacute;dig&eacute; par deux chercheurs du National Bureau of Economic Research [&hellip;]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,1],"tags":[44,62,83],"editors":[2550],"sponsored_companies":[],"class_list":["post-63343","post","type-post","status-publish","format-standard","hentry","category-bitcoin-news","category-news","tag-bitcoin","tag-minage","tag-securite","editors-jurgen-hoffman"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les d\u00e9tails omis par cette \u00e9tude sur la concentration du Bitcoin (BTC)<\/title>\n<meta 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