If you follow the rules that wallets already enforce. There’s a lot of noise around “quantum computers breaking Bitcoin.” The reality is more boring (and more reassuring): 👉 Bitcoin remains quantum-safe if you use it correctly. Most risk only appears when users ignore best practices. The two big rules 👇 -------------------------------- 1️⃣ Never reuse addresses after you spend from them - Once an address is spent from, its public key is revealed on-chain - Reusing that same address again could expose it to future quantum attacks - Modern wallets already generate a fresh address every time — let them Rule: ✅ Receive → Spend → Never reuse that address again 2️⃣ Never give out your xpub (extended public key) unless you fully understand why - An xpub allows someone to: - If someone asks for it casually, that’s a red flag 🚩 Best practice: ----------------------- - Only use xpubs for dedicated payment systems - Create a separate wallet with: - Never mix it with your long-term savings wallet If you don’t know what an xpub is — that’s fine. Just know there’s no reason to share it unless you’re intentionally running a payment setup. The takeaway 🧠 --------------------------- Bitcoin doesn’t fail because of quantum computers. Bitcoin fails when users reuse addresses, overshare keys, or mix wallets improperly. Follow wallet defaults. Segregate roles. Don’t leak information. That’s it. If you want to go deeper on this topic, check out davincij15.com for more. Stay safe. Stack smart. 🟠

I built a 2-of-3 multisig wallet. Did everything right. Felt like a genius. Then I made the mistake most people make. I didn't test it. Years later I opened the wallet. Had my keys. Had 2 of the 3. Entered everything correctly. Zero balance. The keys were right. The setup was right. But the wallet software had silently changed something underneath me — the derivation path. Your seed creates addresses using a hidden "address map". When the wallet updated, it started looking at a different map. My coins were still there. The wallet just couldn't see them anymore. Right key. Wrong door. I got lucky — I had saved the old path and recovered everything. Most people wouldn't have. Now Morgan Stanley wants to "help" by holding your Bitcoin for you. Custody, trading, lending — the full package. Translation: they want your keys. If you're serious about self-custody, multisig is the real move. But if you set it up wrong and don't maintain it, it's just a more complicated way to lose your Bitcoin. I put together 6 rules that would have saved me from that panic. Plus when multisig actually makes sense vs a strong single-sig setup. Please let me know if you want the 6 rules.

If you're using a cold card to secure your bitcoin, you should transfer all of your bitcoin out of your cold card wallet ASAP. A lot of btc has been swiped recently from peoples cold cards. You can read all about it on X/twitter. Here's what I would do right now if using the cold card: Step 1: Transfer all BTC from coldcard onto an exchange (Binance, Kraken, Coinbase, etc.) right now. Note: I normally NEVER encourage you to keep your btc on an exchange, but for the next few days it's a safer option than keeping it on a cold card. Step 2: Order a new type of hardware wallet, like a Blockstream Jade. Step 3: While you wait for your new wallet to arrive, watch a few YT vids to learn how to use it. Step 4: As soon as it arrives, use the dice roll method + add a BIP-39 passphrase to it. Step 5: Transfer your BTC from the exchange to your new hardware wallet. Step 6: Consider a multi sig approach for long term safety. Best, T

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We don't do crypto. We do BTC. We don't trade (buy & sell) BTC. We buy and HODL. We don't try to time the market. When prices drop, we buy. When prices are at an ATH, we buy. We also don't keep our coins on exchanges. We store our BTC in cold storage.