RE:Bitcoin falls 11% after report suggests a critical flaw inNo, Market Insider is a terrible source to listen to for any crypto news. Same goes for any other big news source such as Forbes, bloomberg or Business Insider. Get your crypto news from crypto sources. The double spend isn't even confirmed, also if it is true than this is the first glitch of this kind ever to happen in over 10 years of crypto existing. From what it looks like, the transaction that is under investigation was only sent to one address, so it is not even a true double spend (i.e. the same btc was not sent twice, rather there was a disprepency between the amount sent from the winning and losing chain). Don't worry abount a $21 transaction in a 800B market