Wu said that, according to monitoring by @OrangeFren, Monero (XMR) was attacked again a few hours ago, experiencing 18 block reorganizations. Users accepting XMR payments are advised to wait for more than the usual 10 confirmations. Slow Fog Cosine stated that if the community ignores the block reorganization issue, the risk of double spending will hang over them like the 'Sword of Damocles'.