Sep 11, 2026 · 42 min
Listen from 21:51
Listen at 21:51
Vik Sharma links financial self-custody to private payments
Vik Sharma: Why He Built a Private Messaging App That Sends Bitcoin
The conversation examines whether Bitcoin can reduce dependence on centralized financial systems while making private digital payments more practical.
- 1A Coinbase account closure pushed Sharma toward self-custody and the creation of Cake Wallet.
- 2Radar Chat combines private messaging with Bitcoin payments, extending familiar communication tools into financial transactions.
- 3Sharma sees Bitcoin’s deeper value in permissionless payments and monetary protection, not simply its market price.
Don't miss
Sharma explains how Coinbase closing his account after a Bitcoin payment pushed him to build Cake Wallet.
The brief
Vik Sharma traces a path from electrical engineering and steel production to Bitcoin, where early mining and experimentation led him into building financial tools.
A Coinbase account closure after a Bitcoin payment exposed the limits of custodial finance and motivated Sharma to create Cake Wallet as a simple self-custody alternative.
Sharma argues that open-source security requires more than published code, describing audits that helped identify and fix issues in Bitcoin projects, including Cake Wallet.
Radar Chat brings private messaging and Bitcoin payments together, drawing on Signal, Venmo, Cash App, PayPal, and WeChat while supporting transfers to external wallets.
The conversation connects Bitcoin’s permissionless design to inflation, debt, centralized monetary control, and a future where small payments become easier to use.
What was said on this episode
47 statements · 33 positive · 9 negative · 2 mixed · 3 neutral
Bitcoin protects ordinary people from centralized monetary manipulation.
“That's what Bitcoin has invented, right? To protect the common person from that, from a centralized manipulator.”
Listen at 0:05
Bitcoin enables self-custody and permissionless global electronic value transfer.
“I can self-custody and I can transfer value electronically around the world without any third party, without any permission”
Listen at 0:35
Bitcoin enables self-custody and global electronic value transfer without intermediaries.
“the permissionless nature that I can self-custody and I can transfer value electronically around the world without any third party, without any permission”
Listen at 3:56
Bitcoin is the future of money or technology.
“I thought, you know, this is the future.”
Listen at 4:53
Cake Wallet makes self-custody and cryptocurrency transfers easier.
“I wanted to make self-custody and transferring Bitcoin and other cryptocurrencies easier.”
Listen at 7:37
Much open-source code is not being reviewed by anyone.
“there's all this open source code out there that nobody's reviewing.”
Listen at 10:02
Audits identified Cake Wallet issues that the team fixed.
“They gave some alerts to us as well, which was good, which we jumped on and fixed.”
Listen at 11:03
The United States should not regulate advanced AI tools yet.
“it's too early to start regulating and thinking these tools can be dangerous.”
Listen at 12:38
The administration’s AI regulation is a major mistake.
“I think it's a huge blunder by the administration”
Listen at 13:12
Restricting advanced AI limits competition, progress, and further development.
“once you start limiting and regulating It's not just the competition. It's also you're stopping progress and you're stopping further development”
Listen at 13:19
Restricting AI harms U.S. technological development and leadership long term.
“in the long run, it's very damaging to... our know-how, our development, our progress, our being a tech leader.”
Listen at 13:48
Defending against advanced AI requires building more capable systems.
“we just have to keep building bigger monsters to fight the monsters we've created.”
Listen at 15:14
Future tools will protect Bitcoin users from quantum computers.
“in the future, we will have the tools to guard ourselves against quantum computers.”
Listen at 15:55
Quantum-resistant encryption can be implemented in Bitcoin.
“there's proposals and algorithms and quantum-based encryption that can be implemented into Bitcoin to safeguard that.”
Listen at 16:00
Radar is a private messaging and decentralized payment alternative to Venmo or Cash App.
“I consider Radar a... private messaging slash decentralized payment alternative to like a Venmo or Cash App.”
Listen at 18:24
Radar combines private messaging with decentralized permissionless payments.
“You have private messaging mixed in with decentralized permissionless payment.”
Listen at 18:38
Radar is available on Android and iOS.
“It's totally live. Oh, so it's out there. It's live. It's live on Android and iOS.”
Listen at 18:48
Radar is currently available on Android and iOS.
“It's live on Android and iOS.”
Listen at 18:50
Radar and Signal users can communicate with each other.
“No, Radar and Signal can communicate with each other.”
Listen at 20:04
Radar users can communicate with Signal users.
“Radar and Signal can communicate with each other.”
Listen at 20:05
iMessage is highly private, subject to trust in Apple.
“iMessage surprisingly is very, very private”
Listen at 20:34
iMessage is highly private but Apple may retain control over it.
“iMessage surprisingly is very, very private, except the fact that Apple. could have control over it”
Listen at 20:34
iMessage is fairly private if users trust Apple.
“If you trust Apple, end-to-end, it's pretty private.”
Listen at 20:51
Radar currently supports Bitcoin payments at enabled merchant terminals.
“you can do it today. You can walk in Radar where somebody takes a square terminal. They have the Bitcoin payment feature turned on. You can pay with Radar right now.”
Listen at 24:00
Radar users can send money to one another.
“in Radar, you can. Send money back and forth to other radar users.”
Listen at 24:13
Radar can send Bitcoin to external wallets.
“Or send it to an external wallet.”
Listen at 24:18
China produces more than one billion tons of steel.
“China produces over a billion tons of steel.”
Listen at 25:33
Modern rolling mills can produce ten times more than older mills.
“one mill could produce 10 times what the older mills.”
Listen at 26:03
Steel tariffs can make scrap steel cheaper.
“the raw material becomes cheaper, which is scrap.”
Listen at 26:58
Steel tariffs can increase domestic steel producers’ profits.
“your profit increases actually in the steel industry”
Listen at 27:06
Steel tariffs can increase producer spreads and profits by lowering scrap costs.
“the spreads have increased. So that's why you're seeing companies like Nucor and U.S. Steel make, you know. two, three billion dollars in profit in one year because of that phenomenon.”
Listen at 28:33
Tariff-related steel spreads contributed to Nucor and U.S. Steel profits.
“that's why you're seeing companies like Nucor and U.S. Steel make, you know. two, three billion dollars in profit in one year because of that phenomenon.”
Listen at 28:36
Protectionism will not save the steel industry.
“protectionism is not going to save the industry.”
Listen at 29:56
Protectionism reduces innovation.
“It dampens innovation.”
Listen at 30:08
Tariffs provide only a short-term fix.
“I think tariffs are very, very short term fix.”
Listen at 30:25
There is currently no way out of the debt situation.
“Because I think there's no way out right now.”
Listen at 32:20
Cake Wallet is implementing an internal AI initiative.
“we're we're really um making an initiative internally in cake wallet with ai”
Listen at 33:08
Cake Wallet aims to use AI to improve product security and code quality.
“how to actually use AI with the current people we have to make more secure and better code products for our users.”
Listen at 33:22
Stablecoins can serve as a gateway to Bitcoin adoption.
“stable coins. I'm not a big fan of stable coins, to be honest with you, but I think it's a good gateway to Bitcoin.”
Listen at 33:46
Radar Chat may add stablecoin conversion and balance display.
“That's probably going to be the next thing in radar chat where you'll have the option to always convert to a stable coin and see a stable coin balance.”
Listen at 34:34
Radar Chat plans to add fiat on- and off-ramps.
“we'd like to put a fiat on-ramp and off-ramp”
Listen at 35:43
Radar Chat could replace many existing consumer applications.
“i think radar chat could um could replace a lot of things people are using today”
Listen at 35:55
Vik remains bullish on Bitcoin.
“I'm still very bullish.”
Listen at 37:20
Bitcoin volatility has declined relative to earlier years.
“the more realistic goal or prediction should have been less volatility. And we have achieved that.”
Listen at 37:56
Bitcoin volatility will continue declining.
“I'd like to see, prediction-wise, I'd like to see the continued less volatility.”
Listen at 38:49
Bitcoin spending rules should exempt small transactions from taxation.
“I'd like to see some regulation changes in terms of spending. You don't want everything to be a taxable event.”
Listen at 38:57
Bitcoin should be used more for everyday goods and services.
“I'd like to see it being used more as money for goods and services on a day-to-day basis.”
Listen at 40:20
Statements are attributed to the speaker as said on the episode and reflect their view at the time, not PodLume's. They are not advice.
Books & mentions
Some links are affiliate links — PodLume may earn a commission if you buy.
