Bitcoin-Backed Stablecoins Meet Tokenized Gold as Two Competing Visions for Digital Assets Emerge

The Contenders

December 12, 2019 brought two fundamentally different approaches to creating digital representations of real-world value, and the contrast between them revealed a deep philosophical divide in the cryptocurrency space. On one side stood Money on Chain, launching the first Bitcoin-collateralized stablecoin on the Rootstock (RSK) sidechain. On the other, Nexo made headlines with a $5 million purchase of PAX Gold (PAXG), Paxos’ Ethereum-based token backed by physical gold held in London vaults.

Both projects aimed to solve the same problem — giving cryptocurrency users access to stable, reliable stores of value — but their methods could not have been more different. Money on Chain kept everything on-chain, using Bitcoin itself as collateral through smart contracts on RSK. PAX Gold bridged the physical and digital worlds, tokenizing actual gold bars stored in Brink’s vaults. Bitcoin traded at $7,243 on the day, while Ethereum sat at $145.60, providing the backdrop against which these competing visions were being evaluated.

The timing was not coincidental. With Bitcoin stuck in a tight range and the broader crypto market searching for direction in late 2019, the demand for stable assets that could still participate in DeFi ecosystems was growing rapidly. Both approaches catered to this demand, but each carried distinct risk profiles and philosophical assumptions about what money should be.

Tech Stack Showdown

Money on Chain built its protocol on Rootstock, a Bitcoin sidechain that merges Bitcoin’s proof-of-work security with Ethereum-style smart contract capabilities. The platform was EVM-compatible, meaning developers could write Solidity contracts that executed within Bitcoin’s security umbrella. After eleven months of simulations, testing, and two independent audits, the team launched the Alpha version of their decentralized stablecoin protocol.

The protocol introduced two tokens: Dollar on Chain (DOC), a USD-pegged stablecoin collateralized by Bitcoin, and BitPRO (BPRO), designed for Bitcoin holders seeking passive income. BPRO holders received a share of platform fees, an interest rate, and a small leverage position on Bitcoin’s price. All collateral was held in smart contracts on the RSK network — no bank accounts, no custodial intermediaries, no counterparty risk beyond the smart contract code itself.

PAX Gold took the opposite approach. Each PAXG token represented one fine troy ounce of Good Delivery gold stored in Brink’s vaults in London. The token operated on Ethereum as an ERC-20 asset, benefiting from the vast DeFi ecosystem already emerging on that platform. BitGo, the institutional digital asset custodian, had just added support for PAXG across its hot and cold wallet infrastructure, signaling growing institutional comfort with tokenized physical assets.

The technical trade-off was clear: Money on Chain offered pure decentralization but operated on a relatively obscure sidechain with limited liquidity and user base. PAX Gold offered familiarity — everyone understands gold — but relied on physical custody, regulatory compliance, and trust in Paxos as a regulated financial institution.

Community and Ecosystem

Money on Chain’s launch was championed by the Bitcoin maximalist community as proof that Bitcoin could support a full DeFi ecosystem without needing Ethereum. Max Cajurzaa, CEO and co-founder of Money on Chain, framed the launch as a step toward a more open and transparent financial system, explicitly positioning the protocol as an enabler for lending, credit, and advanced trading built on Bitcoin.

Diego Gutiérrez Zaldívar, co-founder of Rootstock, went further, calling Bitcoin-backed stablecoins the key component to bridge traditional economies with crypto-economies. The rhetoric was ambitious: turning financial inclusion into reality through Bitcoin DeFi. Users could access the platform through MetaMask and Nifty wallets, with a public metrics dashboard showing all on-chain liquidity.

The PAX Gold ecosystem had a different flavor entirely. Nexo’s $5 million purchase pushed PAXG’s market capitalization above $11 million — more than twice the size of the next largest digital gold token. Antoni Trenchev, Nexo’s managing partner, noted that the company’s 500,000-plus users had shown strong interest in tokenized gold, with many requesting to swap existing crypto collateral (BTC, ETH, XRP, XLM) into PAXG. This was not crypto-native DeFi experimentation — it was traditional wealth preservation wrapped in blockchain infrastructure.

Adoption Metrics

The adoption paths for these two approaches diverged sharply. Money on Chain was starting from zero — an Alpha launch on a sidechain that, despite being secured by over 60% of Bitcoin’s hash power, had minimal mainstream recognition. The platform needed builders to create lending protocols, DEXs, and other DeFi primitives on RSK to generate genuine demand for DOC. Without a thriving ecosystem, the stablecoin would struggle to find users.

PAX Gold had the advantage of tangible backing that required no crypto-native knowledge to understand. Gold has been a store of value for millennia, and tokenizing it was conceptually simple even for traditional investors. BitGo’s institutional custody support was a significant adoption catalyst — any institution already using BitGo could add PAXG to their portfolio without additional technical integration.

However, PAXG’s adoption was inherently limited by the cost and logistics of physical gold custody. Every token required actual gold to be purchased, transported, and stored in vaults. Scaling meant scaling physical infrastructure. Money on Chain, by contrast, could scale as fast as Bitcoin itself — the collateral was already on-chain, and the only constraint was demand.

Nexo’s OTC desk reported significant interest from clients looking to diversify their crypto collateral into PAXG, suggesting that tokenized gold was finding product-market fit as a hedge within crypto portfolios rather than as a standalone investment. This use case — diversification within a crypto-native portfolio — was something Money on Chain could also serve, but with Bitcoin-denominated stability instead of gold-denominated stability.

The Final Verdict

The simultaneous emergence of Bitcoin-backed stablecoins and tokenized gold in late 2019 posed a fundamental question that remains relevant: should the crypto ecosystem build its own monetary foundations from scratch, or should it tokenize existing stores of value? Money on Chain bet on the former — that Bitcoin itself, through smart contracts and DeFi primitives, could generate enough stability and utility to rival traditional assets. PAX Gold bet on the latter — that the fastest path to adoption was wrapping assets people already trusted.

Both bets had merit. Bitcoin-collateralized stablecoins offered censorship resistance, pure decentralization, and alignment with crypto’s founding ethos. Tokenized gold offered familiarity, regulatory clarity, and an anchor to an asset with thousands of years of trust. The market would ultimately decide which approach — or which combination of approaches — would win, but December 12, 2019 marked the moment the competition became explicit and the battle lines were drawn.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Cryptocurrency investments carry significant risk. Always conduct your own research before making investment decisions.