Vision
In 2028, any Bitcoin holder in the world will be able to borrow USDC privately, in minutes, without giving up custody — from their phone. That is the Writz vision. No custody. No KYC. No public record of the loan. A transaction that starts with Bitcoin in your wallet and ends with USDC in your account, enforced entirely by math.Why This Vision Is Worth Building
Bitcoin is the world’s largest crypto asset by market cap. Over 900 million people own it. The vast majority of them — 77% by most estimates — have never used it in DeFi. Not because they don’t want to. Because every option today requires one of two concessions: give your BTC to a custodian (WBTC, tBTC), or accept that your financial life is public (Aave, Compound, Blend). Writz removes both barriers simultaneously. The BTC stays on Bitcoin — secured by Bitcoin Script, accessible only by the user. The loan happens on Stellar — where native USDC lives, where ZK proof infrastructure exists, where compliance-grade privacy makes institutional participation possible. The position stays private — zero-knowledge proofs ensure that nobody watching the blockchain can see your collateral, your debt, or your liquidation threshold. This is not an incremental improvement on existing BTCfi. It is a different category.The Three-Layer Moat
Writz’s competitive position is not built on branding or funding. It is built on compounding technical depth.Layer 1 — Time
Building a Bitcoin SPV client on Soroban from scratch and getting it audited takes 12–18 months. A well-funded team starting today arrives in late 2027 — by which time Writz will have:- Over a year of mainnet operation with no security incidents
- Real TVL, organic user growth, and verifiable on-chain metrics
- An open-source SPV SDK integrated into the Stellar ecosystem
Layer 2 — The Trusted Setup Ceremony
The Groth16 ZK circuits require a one-time trusted setup ceremony — a multi-party computation event that is public, permanent, and irreplaceable. The ceremony produces verification keys that are baked into every Writz ZK proof. A competitor cannot “copy” Writz’s ceremony — they need their own, with their own participants, their own public transcript, and their own community trust-building process. This creates an asymmetric advantage: Writz’s ceremony happens once, with community participation, and establishes cryptographic legitimacy. Building that trust takes time.Layer 3 — Ecosystem Lock-in
The Writz Bitcoin SPV SDK is free infrastructure for the Stellar ecosystem. Every Stellar wallet that integrates it, every protocol that builds on it, every developer who ships a product using it: these are switching costs that accumulate invisibly. By the time there are 5 integrations, Writz is load-bearing infrastructure for Stellar’s Bitcoin-awareness. By 10 integrations, Writz is the canonical answer to “how does Bitcoin work on Stellar?” Replacing it requires not just building a better contract — it requires convincing every integration partner to migrate simultaneously.Writz in 2028 — The Full Picture
$100M+ TVL in PrivateLend
Bitcoin holders trust Writz because:- The smart contracts have passed two Audit Bank engagements (initial + Growth Audit)
- Over a year of mainnet operation with zero critical incidents
- TVL grew progressively from 250K → 5M → 100M
- The ZK privacy has been validated in practice — no position has ever been traced on-chain
The WRTZ Token — Real Yield, No Speculation
The WRTZ token launches at $5M TVL (Q2–Q3 2027), with a community-first structure:- Fair IDO / Liquidity Bootstrapping Pool — no VC cliff dumps at steep discounts
- Real-yield mechanics: protocol revenue is used to buy and burn WRTZ from the open market
- Governance: WRTZ holders vote on TVL cap increases, fee adjustments, new product launches, and insurance fund payouts
The Full Product Suite
By 2028, all four products are live:- PrivateLend — the flagship, proven, at $100M TVL
- Dark Swap — processing $10M+/month in BTC-to-USDC conversions, capturing a category that currently requires KYC-gated exchanges
- BTC Savings — serving retail and institutional Bitcoin holders who want USDC yield without selling
- ZK Proof of Reserve — 20+ enterprise customers paying monthly subscriptions
Stellar Ecosystem Infrastructure
The Writz Bitcoin SPV SDK is integrated into:- Xverse (BTC wallet with a “Writz” button in the DeFi section)
- Freighter (Stellar wallet with BTC collateral option)
- Lobstr (BTC yield product in the savings section)
- 7+ Stellar DeFi protocols using the SDK for Bitcoin verification
Institutional Presence
Writz has 5+ institutional deposits of $100K+ each — crypto funds, family offices, and mining companies using the protocol for treasury management. The ZK privacy layer makes institutional participation possible: no competitor can see positions, no front-running risk, compliance documentation available via ASP selective disclosure.The Bigger Picture
Writz is not just a product. It is the protocol that connects the world’s largest crypto asset to the world’s most compliance-friendly blockchain. Bitcoin is the foundation. Stellar is the network. ZK is the fence. The house is where the financial future lives. What starts as a lending protocol becomes infrastructure. The SPV SDK becomes the standard. The USDC loans become a gateway for BTC holders who have never touched DeFi. The ZK privacy layer becomes the template for how all sensitive DeFi should work — not just for crypto, but for any financial activity that deserves confidentiality. That is the 2028 vision. The first step is a single Bitcoin transaction, verified by a Soroban contract, followed by the first private USDC loan issued against real BTC collateral. That step is months away.See the execution plan: Phases →