How are you, hacker? How are you, hacker? 🪐 What’s happening in tech today, October 21, 2025? The
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          On this day,
          
            Guggenheim Museum opens in New York City in 1959,  The Battle of Trafalgar Began  in 1805,  Alfred Bernhard Nobel is Born  in 1833, 
          
          and  we present you with these top quality stories. 
          
            From 
        How AI Can Help You Avoid Overpaying for Bitcoin Transactions
       to 
        “Not My Keys, Not My Crypto?” Maybe It’s Time For an Upgrade?,
       let’s dive right in. HackerNoon Newsletter homepage On this day, Guggenheim Museum opens in New York City The Battle of Trafalgar Began Alfred Bernhard Nobel is Born How AI Can Help You Avoid Overpaying for Bitcoin Transactions How AI Can Help You Avoid Overpaying for Bitcoin Transactions “Not My Keys, Not My Crypto?” Maybe It’s Time For an Upgrade? “Not My Keys, Not My Crypto?” Maybe It’s Time For an Upgrade? The Dragon Hatchling Learns to Fly: Inside AI’s Next Learning Revolution The Dragon Hatchling Learns to Fly: Inside AI’s Next Learning Revolution By @zhukmax [ 17 Min read ] Exploring Brain-like Dragon Hatchling (BDH) — a new AI model that learns on the fly, adapts like a brain, and challenges the transformer era. Read More. @zhukmax Read More. How AI Can Help You Avoid Overpaying for Bitcoin Transactions How AI Can Help You Avoid Overpaying for Bitcoin Transactions By @blockchainize [ 6 Min read ] AI-driven framework FENN predicts optimal Bitcoin transaction fees in real time, improving accuracy and preventing overpayment or confirmation delays. Read More. @blockchainize Read More. Synchronizing Data from MySQL to PostgreSQL Using Apache SeaTunnel Synchronizing Data from MySQL to PostgreSQL Using Apache SeaTunnel By @williamguo [ 4 Min read ] A step-by-step walkthrough of building a real-time data pipeline to merge and synchronize MySQL data sources using Apache SeaTunnel. Read More. @williamguo Read More. “Not My Keys, Not My Crypto?” Maybe It’s Time For an Upgrade? “Not My Keys, Not My Crypto?” Maybe It’s Time For an Upgrade? By @paulquickenden [ 5 Min read ] Is the old crypto mantra of Not my keys, not my crypto actually still relevant? Read More. @paulquickenden Read More. From Cloud to Desk: 3 Signs the AI Revolution is Going Local From Cloud to Desk: 3 Signs the AI Revolution is Going Local By @hacker-Antho [ 4 Min read ] when it comes to AI smaller is better Read More. @hacker-Antho Read More. 🧑‍💻 What happened in your world this week? It's been said that
          writing can help consolidate technical knowledge,
          establish credibility,
           and contribute to emerging community standards.
          Feeling stuck? We got you covered ⬇️⬇️⬇️ writing can help consolidate technical knowledge establish credibility and contribute to emerging community standards ANSWER THESE GREATEST INTERVIEW QUESTIONS OF ALL TIME ANSWER THESE GREATEST INTERVIEW QUESTIONS OF ALL TIME We hope you enjoy this worth of free reading material. Feel free to forward this email to a nerdy friend who'll love you for it.See you on Planet Internet! With love, 
 The HackerNoon Team ✌️

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The HackerNoon Newsletter: From Cloud to Desk: 3 Signs the AI Revolution is Going Local (10/21/2025)

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