USDT on TRON was freedom money in Buenos Aires. So many issues, but it's what I saw.
erik
erik@primal.net
npub1zqsu...cqrs
Bitcoin Product Designer @ Hoseki. Human Rights Foundation grantee working on ecash.
There’s something magical about meeting a stranger in their own country and hearing them share a unique part of their culture that they’re proud of.
Been living off Lightning -> USDT (Tron) -> Argentine pesos (cash) all week. Haven’t touched a single traditional banking rail. Speed Wallet has made this so easy.
Do I have any followers / friends in Buenos Aires?
Bitcoin is more than 25% of the way through its current halving epoch. Time flies when you're having fun.
I’m going to Buenos Aires soon. Looking for reliable places/people to exchange BTC for pesos. Please DM if you know anyone.
Export Cashu token functionality for BTCNutSever v0.1.0 was designed in the Brazilian Atlantic forest.


This is what EU bureaucrats took from us.


Any designers or design adjacent people coming to BTC Prague?
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Art by Mac Baconai


Accidentally scrolled on the “for you” tab over at twitter / X. What a horrible place. I’m so thankful for Nostr.
I stroll the eightfold with merriment
There’s no real line between work and life when you’re doing something that actually matters to you.
A life spent building an open-source electronic cash system isn’t a life wasted.
Been thinking about how ecash wallets handle mint selection.
Option 1: Automatic mint connection.
You connect users to a default mint automatically during onboarding.
✅ No friction
✅ Noob friendly
✅ Start making transactions right away
Comes with risks: Passive users, mint centralization, and custodian choice lands on the wallet.
Option 2: Manual mint selection
More common approach. Show users a list of mints (usually via bitcoinmints.com) and ask them to pick one before proceeding.
There’s a third approach I keep circling back to: Just-in-time mint selection.
The wallet doesn’t ask you to choose anything upfront. You’re asked to trust a mint only when you first try to do something, like claim ecash or top up your wallet.
Every approach appeals to different types of users. Depends on what wallet devs want to prioritize too. How and when you throw the decision to the user shapes how they relate to ecash.
Option 1: Automatic mint connection.
You connect users to a default mint automatically during onboarding.
✅ No friction
✅ Noob friendly
✅ Start making transactions right away
Comes with risks: Passive users, mint centralization, and custodian choice lands on the wallet.
Option 2: Manual mint selection
More common approach. Show users a list of mints (usually via bitcoinmints.com) and ask them to pick one before proceeding.
There’s a third approach I keep circling back to: Just-in-time mint selection.
The wallet doesn’t ask you to choose anything upfront. You’re asked to trust a mint only when you first try to do something, like claim ecash or top up your wallet.
Every approach appeals to different types of users. Depends on what wallet devs want to prioritize too. How and when you throw the decision to the user shapes how they relate to ecash.omeone told me today they think I’m a great designer. That’s always nice to hear. It’s tough to really know where you stand. Funny cause in Cashu I kind of win by default. I’m probably the only designer heads down in this so…I guess that makes me the best by default.
Money as an open-source collaborative project is wild. Bitcoin is truly something.

On the weekends I can sit and work on Cashu all day. No meetings. I am happy.