binji Profile picture
Jun 29 1 tweets 3 min read Read on X
How to build a great crypto consumer app in 2026.

The Thesis:

The real opportunity is not to build better crypto apps but to build apps where crypto is the substrate and the access point to new experiences. 

The Four Tenets:

Any bet made under this thesis should clear four tests.

1. Think in terms of outcomes:

Stablecoins are not applications but infrastructure, and, depending on the user, they can be a way to do business cheaper, or a way to flee a tyrannical government. Applications are what gets built on top of this infrastructure, e.g a payments app.
You cannot just “build an app for stablecoins,” you must build an app that serves a specific user set with a specific outcome.

This is my hunch as to why crypto wallets have largely failed outside of crypto: they are far too general purpose. If I tell a friend to download a wallet, there is no outcome I can share with them.

B2B businesses have it better, if we look at Bridge which got acquired by Stripe for $1B in cash, it's clear that their outcome as a business was simple: “Businesses choose Bridge as the only platform they need to easily receive, store, convert, issue and spend stablecoins.” So, if your were to build something, it would be prudent to build for an OUTCOME for a user you narrow down. 

While working, any feature addition, any marketing spend idea should be delivered with an attached outcome, otherwise it is just vibes based work. 

2. Real users from day one: 

The product has to meet an existing need vs manufacture a new one.

Crypto has spent a decade building solutions in search of problems. The user base on day one should be people who already do the behaviour in question and would switch to a better version of it, and it must be ten times better, not 10% better. 

3. 10x better, not 10% better

UX is the moat! The internal ordering of future teams, from the engineering priorities, the roadmap, all of it has to flow from user experience rather than raw protocol capability. This is how Revolut out-executed every incumbent bank in Europe despite having a weaker balance sheet and a narrower product range for years.
Marginal improvement does not move users off an incumbent. A crypto card that is slightly better than Revolut loses, it does not disrupt user behavior. But, a crypto card that does something Revolut structurally cannot, eg lets say, introduce user-programmable bill splitting or private settlements, might actually stand a chance. 
4. Catching key lifestyle trends

Many winners rarely invent categories, they tend to catch a shift in user behaviour of an existing category. BeReal did not invent photo sharing but it caught the moment when curated Instagram felt exhausting. Aave did not invent lending but it caught the moment when permissioned finance became more restrictive and less globalized and when decentralized currency holdings created whales locked out of permissioned finance. Revolut did not invent banking but it caught the moment when old boomer banks felt hard to use and an online native younger generation started to have more disposable income.

The ideas are out there, AI accelerates the ability to execute them, but an idea is only as good as the user need it serves at a given time.



The real power lies in using crypto as a substrate to power new experiences and having the product discipline and user empathy to build for a real audience with a real need.

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More from @binji_x

May 10
PRIVACY IS MORE THAN MONEY

This is what the Kohaku project is, straight from its core contributors, @VitalikButerin and @ncsgy.

TLDR: it is a serious attempt to rethink online safety and privacy across money, AI, and life.

Let’s dive in. Image
Kohaku starts from this problem: the internet leaks more than people realize.

Your wallet can leak.
Your browser can leak.
Your app can leak.
Your RPC provider can leak.
Your IP can leak.

Soon, your AI agent can leak too.

Just having private apps/txns is NOT enough.
A system is truly private when it stops leaking data, and secure when it stops leaking money. That means you have to care about every layer the user actually touches.

You cannot just clean one room in the house and leave the kitchen dirty. We need ways to clean the whole house.
Read 17 tweets
Jun 2, 2025
today, @ethereum made its biggest upgrade in years…not to code, but to coordination.

Image
the @ethereumfndn launched a new core unit called “protocol.”

it’s led by legends and it’s the clearest signal yet that the @ethereumfndn is entering its pragmatic, aggressive, and winner era.

let’s learn more ↓
the north star:

- scale the base layer
- scale blobs for rollups
- improve the user experience

this is ethereum with a product roadmap, one that benefits users, apps, and eth holders alike. Image
Read 7 tweets
Apr 15, 2025
here is a explainer thread on zk

for normal people who use the internet and want it to respect them

imagine you could prove you’re over 18

without showing your birthday, or your name, or your ID

just: yes, i’m legit

and that’s all the site ever sees

that’s zk
zk = zero-knowledge

a way to prove something is true
without revealing the thing itself

you prove the fact not the data
and suddenly, the internet can get a whole lot more private, safe, and human
Read 10 tweets
Apr 2, 2025
everyone’s talking about stablecoins
but most people miss what’s actually happening under the hood.

we’re reviving one of the most radical ideas in banking history:

narrow banking, rebuilt onchain. ↓ Image
to understand this shift, you need to know two models:

fractional reserve banking
vs
narrow banking

this ideas affect how money works, how credit flows, and what role banks play.
fractional reserve banking is what we use today.

banks keep a fraction of deposits in reserve (say 10%) and lend out the rest.

this lets them create money through credit.

but it also makes them fragile.
Read 16 tweets
Jan 6, 2025
adding cryptography to ai..some weekend thoughts 🧵

imagine an agent so intimately woven into your daily life that it’s almost a second brain. it checks your emails, invests your money, and even makes deals on your behalf.

but here’s the key question: how will you trust it?
leading researchers predict personal ai agents will become as common as smartphones in the next decade (see de lange et al)

these agents won’t just answer queries; they’ll evolve with you, learning from every email, transaction, or conversation you have.

BUT the risk today is that if they’re compromised or manipulated, then well...you're f*cked.
the privacy dilemma:

these ai agents will handle everything from financial transactions to sensitive health data. one breach could expose it all. so how do we solve this?

1. secure hardware enclaves (tees): run sensitive computations in isolated hardware zones, even if the OS is compromised, the data remains encrypted within the enclave. see the work of @sxysun1 @socrates1024 @ropirito @NousResearch @flashbots_x to see what this looks like for agents.

2. zero-knowledge proofs: prove an agent followed your instructions (e.g., made a correct calculation) without revealing the raw data.
Read 13 tweets
Jan 1, 2025
the ethereum pectra upgrade is coming. it’s one of the most ambitious upgrades yet.

here is what you need to know 🧵
so, what is pectra?

pectra = prague + electra.

it’s ethereum’s glow-up.

let’s dive in.
first, the process:

teams tested over 100 devnets during an event in kenya (nyota interop). they tried everything. from there, they narrowed down 20+ ideas into 11 that are ready for prime time.

prime time = pectra
Read 15 tweets

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