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Check out our bitcoin wallet hardware prototypes! And learn about how we build them here: wallet.build/how-we-design-…
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Max Guise
250 posts
Max Guise
@max_guise
Building @Blocks
Albuquerque, New Mexico Katılım Haziran 2020
631 Takip Edilen4.5K Takipçiler
@turtlecute33 @Bitkey Can you DM me more information about what you’re seeing with UTXO consolidation?
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Me: hey @Bitkey I found a bug in your UTXO selection
Bitkey: great, just fill out this form
The form: Where are you located, email, phone model, Android version, hardware wallet serial number, childhood pet's name, underwear size, blood sample.
I just wanted to report a bug..
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Max Guise retweetledi
@SatsAndSilver @Bitkey If you just completed a recovery, or if you had manually deleted your Emergency Exit Kit (or if it became corrupted) and then you followed the cloud repair process subsequently suggested by the app, then it would update.
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Max Guise retweetledi
We saw your replies to our Bitcoin Lead @milessuter’s post x.com/milessuter/sta… about helping local @Square sellers accept bitcoin 👀
So we’re piloting something new.
Help a @Square seller take their first bitcoin payment, and get $25 of BTC. A win-win for you and the neighborhood.
Miles 🌞@milessuter
We are building a real bounty system to pay out @CashApp customers that onboard new @Square merchants to BTC payments but why wait? Reply with a video of you and a new merchant receiving their first bitcoin payment and I’ll send you $25 in ₿ for each new addition to the map 📍
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@Buy_and_Hold @Bitkey @Square We’re focused on helping people safely and easily hold bitcoin, rather than take their wallet with them to pay for things. And since you’re in the US: you can pay at Square terminals using btc on Cash App, or even with your $ balance while the seller receives btc
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Recently @max_guise joined What Bitcoin Did to talk about the next phase of bitcoin self-custody.
From Bitkey’s privacy upgrade and Chain Code Delegation, to @Square enabling bitcoin payments at scale — this conversation covers what it actually takes to make bitcoin usable in the real world.
Hosted by @_DannyKnowles 🎙️
youtube.com/watch?v=4ErTj6…
YouTube
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Max Guise retweetledi
We’re heading to Abu Dhabi 🇦🇪
Bitkey will be at Bitcoin MENA next week — connecting with the global bitcoin community and sharing how we’re making self-custody simpler, safer, and seedless.
If you’re attending, come find us at Booth M-51.
@bitcoinmenaconf mena.b.tc
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Max Guise retweetledi
This is one the best things privacy-wise that ever happened in Bitcoin since MuSig2.
BIP89 (Chain Code Delegation) enables private collaborative custody by letting delegates withhold BIP32 chain codes—allowing co-signing w/o exposing full xpubs. This means that your multisig counter-party (Bitkey here, but could be many others that have a similar product/service) can sign your transactions and just learning about that specific address (and transaction) that you're spending while being fully oblivious to your other UTXOs and addresses (that it has not seen or have been tasked with co-signing yet). Fucking awesome!
Bitkey@Bitkey
Chain Code Delegation has now been assigned BIP 89 — a big step forward for private collaborative custody in bitcoin. With privacy fully rolled out in the Bitkey app, customers who update now benefit from the first implementation of this emerging standard. A big moment for the ecosystem — and for self-custody. github.com/bitcoin/bips/p…
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Max Guise retweetledi
Chain Code Delegation has now been assigned BIP 89 — a big step forward for private collaborative custody in bitcoin.
With privacy fully rolled out in the Bitkey app, customers who update now benefit from the first implementation of this emerging standard.
A big moment for the ecosystem — and for self-custody. github.com/bitcoin/bips/p…
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Max Guise retweetledi
@ozsats256 @stack2thefuture Ah, yes I see that in your profile now - I’ll take a look in case we can do better in AU
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@max_guise @stack2thefuture I’m in Australia. Had one shipped recently. While I didn’t dox my home address I still had to dox an address somewhat linked to me.
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Once again Bitkey doing based shit while the haters hate.
Bitkey@Bitkey
You can now buy a Bitkey without giving up your home address. Ship to thousands of pickup points across the U.S. — FedEx, Walgreens, Kroger, Dollar General, and more. Pay with bitcoin, pick up privately, and stay in control. #pickup-points" target="_blank" rel="nofollow noopener">bitkey.world/learning-hub/b…
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@ozsats256 @stack2thefuture Most PO Boxes in the US have a street address for the post office that you can use with “Unit x” added, where x is your box number. You need to check w/your post office though, sometimes you have to use a different zip code. Works great for me. Still best to use pickup though!
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@austinvach @milessuter @CashApp @blocks Do you want this primarily for privacy reasons / coin separation, or for multiple family members, or something else?
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@milessuter @CashApp @blocks The ability to create multiple wallets using Bitkey hardware and Bitkey app would be great.
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Currently brainstorming on “Cash App Maxi” mode. Our goal in 2026 is to make this a no brainer, so tell me:
1) what it would take for you to do all your bitcoin activity on @CashApp
2) what other @blocks ecosystem connection points you would find valuable
Sterling@ellipticurve
@milessuter @CashApp @Bitkey Miles, you’ve checked nearly every box for me. Cash App is back for bitcoiners! The last remaining big-ticket item is a Bitcoin IRA product. I’d like to move my Fidelity IRAs into Cash App and use the funds for self-custody Bitcoin on my Bitkey 🥹
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Max Guise retweetledi
We’re wrapping up 2025 with 0% fees on bitcoin buys when you pick @CashApp in Bitkey — now through the end of the year.
The banks might be holidazed (how many are we at now?) but bitcoin never rests. Happy stacking.
Terms apply: bitkey.world/en-US/blog/cas…
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Max Guise retweetledi
Within @Bitkey, we’ve turned on the ability to smash buy bitcoin to self-custody (via @CashApp) with:
- no fees
- no spread
- free auto-withdrawal
Unprecedented.
Miles 🌞@milessuter
Can you spot the spot the new feature / enhancement we are dropping tomorrow with @CashApp + @Bitkey?
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@Novanoodle5165 @milessuter @CashApp @Square Just paid via bitcoin at @sunriseshackhi this morning, too. Totally seamless, great bullet coffee, and of course, no fees!
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@milessuter @CashApp @Square Aloha!! Just used Bitcoin at The Sunrise Shack in Kailua, Hawaii. First time they had ever accepted it.
When I mentioned paying in Bitcoin, the cashier responded with “what is Bitcoin?” 😂
Cool kids.
I pointed them to their stickers at the register. Mahalo @CashApp
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We are building a real bounty system to pay out @CashApp customers that onboard new @Square merchants to BTC payments but why wait?
Reply with a video of you and a new merchant receiving their first bitcoin payment and I’ll send you $25 in ₿ for each new addition to the map 📍
Miles 🌞@milessuter
Poetry in motion. We sprinted to get today's version out the door, but we have big plans for v2 of BTC Map. Quests, Bounties and many more ways to incept and grow the bitcoin economy... together as a community.
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Max Guise retweetledi
@milessuter @floundies @Stromens @CashApp 🤯🤯🤯🤯🤯🤯🤯
Bro way to bury the lede.
This is AWESOME. I just tried it and it worked.
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Max Guise retweetledi
I got a step-by-step demo of how to take self-custody of Bitcoin with @Bitkey and recover sats from lost devices - all without a seed phrase. Don’t miss the full how-to experience:
youtu.be/GT93mHvJLao?si…
YouTube
Bitkey@Bitkey
That time @natbrunell author of Bitcoin is for Everyone sat down with our Marketing Lead @tessapettman to get the full Bitkey experience. Watch Natalie set up 2-of-3 multisig in minutes, add an inheritance beneficiary, and recover her bitcoin — all without a seed phrase. Watch the full interview here: youtube.com/watch?v=GT93mH…
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Max Guise retweetledi
@isabellasg3 I recently gave each of my children a multi-sig wallet as their inheritance. I chose @Bitkey for its simplicity (no seed phrase to worry about) while not compromising on security. Ideal!
Thank you @jack
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Max Guise retweetledi
