Daily Crypto Brief — September 17, 2026

Independent market reading, curated by Gold Card. Today’s crypto headlines are linked directly to their original publishers.

• How Circle’s institutional Arc blockchain got taken over by memecoins on day one
  CoinDesk · Sep 17, 2026 · 08:42
• Optimism creeps back into crypto, with the 2022 test still to come
  CoinDesk · Sep 17, 2026 · 08:19
• Zama Opens Confidential Access to DeFi’s Existing Yield Venues
  Investing.com Crypto · Sep 17, 2026 · 08:00
• Live updates: Bitcoin flat near $76,000 as stocks set for sharply higher open
  CoinDesk · Sep 17, 2026 · 07:41
• Crypto rallies through the Fed's first rate increase since 2023
  CoinDesk · Sep 17, 2026 · 07:40
• Zcash gains 20% as Paradigm founder reveals firm made ZEC investment
  Cointelegraph · Sep 17, 2026 · 07:35
• Revolut says no direct contact after $3 million public ransom demand
  Cointelegraph · Sep 17, 2026 · 06:57
• Polymarket users referred to prosecutors in South Korea: Report
  Cointelegraph · Sep 17, 2026 · 06:37

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