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Marius

Journalist and founder of Off-Chain Media

Marius

Journalist and founder of Off-Chain Media

Journalist and educator passionate about Bitcoin, I strive to make this often complex subject accessible to all.

I produced a documentary filmed in El Salvador that pragmatically explores Bitcoin’s impact on the country. Each week, I host “Pair à Pair,” a show that delivers clear and precise analysis of Bitcoin news and protocol developments.

I founded Off-Chain Media to contribute to the democratization of Bitcoin and its tools.

Signed · 25 articles
BitcoinJuly 18th, 20266 min read

Bull Bitcoin drags DAC8 before the Conseil d’État to have it canceled and draws a line in the sand

Bull Bitcoin announces that it has brought the French decree transposing DAC8 before the Conseil d’État, even though the company has just obtained its MiCA authorization. Behind this apparent paradox, Théo Mogenet, Managing Director of Bull Bitcoin Europe, defends a simple line. A Bitcoin platform can accept entering the European framework, without accepting that compliance becomes the systematic collection of sensitive data.

BitcoinJune 18th, 20268 min read

El Salvador, Bitcoin and Bukele: Audit of a Political Laboratory

In 2021, El Salvador became the first country to adopt Bitcoin as legal tender. Five years on, the balance sheet is contradictory: real security gains, an IMF deal that walked back the experiment, and a sovereignty narrative far simpler than the reality.

Layer 2June 2nd, 202620 min read

What is Spark? The Bitcoin Layer 2 behind the new wave of self-custodial wallets

Spark is a Bitcoin Layer 2 based on statechains and shared signing. It gives wallets a way to offer a Lightning-like payment experience without taking direct custody, but its self-custody guarantees are weaker than holding bitcoin directly on L1.

Layer 2May 31th, 202615 min read

What is the Ark protocol? The missing piece to make Bitcoin a scalable everyday currency

Bitcoin is often described as a store of value, a form of “digital gold” meant to be held rather than spent. Yet, to function as a true monetary system, it must also enable payments that are fast, simple, and accessible. While solutions like the Lightning Network have significantly improved this aspect, they still introduce a level of complexity that limits adoption. It is in this context that the Ark protocol emerges.

LightningMay 30st, 202620 min read

What Is the Lightning Network? Bitcoin's Payment Layer Explained

The Lightning Network is Bitcoin's payment layer, enabling instant, low-cost transactions without compromising decentralization. Discover why it exists, how it solves Bitcoin's scaling limits, and whether it is a viable long-term solution or just an intermediate step in Bitcoin's evolving monetary infrastructure.

BitcoinMay 29th, 202621 min read

What Is Bitcoin? The Digital Currency Challenging Gold and Central Banks

Bitcoin is often treated as a speculative asset, but its purpose is more structural: to offer a scarce, verifiable digital currency without a central issuer. Here's how it works, what problem it solves, and why it matters beyond ETFs and exchanges.

Layer 2May 8th, 20265 min read

What is Citrea? The Bitcoin rollup powered by BitVM?

While Bitcoin still concentrates most of the liquidity in the crypto market, its use remains largely limited to value transfer and long-term holding. This contrasts with other ecosystems where on-chain financial applications have expanded significantly. It is within this context that Citrea emerges, aiming to make Bitcoin programmable without modifying its base protocol.

LightningMay 8th 20265 min read

What Is E-Cash? David Chaum’s Confidential Transaction Protocol on Bitcoin

E-Cash is making a comeback in the Bitcoin ecosystem through protocols like Cashu and Fedimint. At its core lies an older idea: enabling digital payments that are as private as physical cash, without exposing every transaction to a public ledger or a centralized intermediary.

Layer 2May 7th, 20265 min read

What is Rootstock? The Bitcoin sidechain for smart contracts

Bitcoin was designed as a monetary system, not as a programmable platform. Yet over the past few years, several solutions have attempted to extend its capabilities without modifying its core protocol. Rootstock fits into this trend: a sidechain aiming to bring smart contracts to the Bitcoin ecosystem.