> ## Documentation Index
> Fetch the complete documentation index at: https://writz.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Market landscape

# Research: Market Landscape — BTCfi + Privacy on Stellar

**Author:** Justin (Business Analyst)
**Date:** 2026-06-22
**Status:** Complete — initial survey

***

## BTCfi Market

### Growth trajectory

Bitcoin DeFi has been one of the breakout trends of the 2024–2025 cycle:

| Date          | BTCfi TVL |
| ------------- | --------- |
| January 2024  | \$304M    |
| December 2024 | \$7B+     |
| Mid 2025      | \$8.6B+   |

That is a **28x growth in 18 months**. The market is expanding fast and still early.

### What is driving growth

* Bitcoin holders want to generate yield without selling BTC or giving up custody
* Institutional interest in BTC-collateralized lending (cleaner regulatory profile than altcoins)
* Maturing cross-chain infrastructure making BTC accessible on other chains
* Bitcoin's "digital gold" narrative evolving toward "productive asset"

### Current BTCfi players

| Protocol                   | Chain         | Mechanism             | Privacy |
| -------------------------- | ------------- | --------------------- | ------- |
| WBTC (BitGo)               | Ethereum      | Custodial bridge      | None    |
| tBTC                       | Ethereum      | Threshold signatures  | None    |
| Aave (WBTC collateral)     | Ethereum      | Lending               | None    |
| Compound (WBTC collateral) | Ethereum      | Lending               | None    |
| Stacks (sBTC)              | Stacks L2     | Threshold bridge      | None    |
| RSK (RBTC)                 | RSK sidechain | Federated peg         | None    |
| Starknet (strkBTC)         | Starknet      | ZK-powered            | Partial |
| Interlay (iBTC)            | Polkadot      | Collateralized vaults | None    |

**Key observation:** Every significant BTCfi player is either on Ethereum or a Bitcoin L2/sidechain. **None are on Stellar.** And none offer full ZK-privacy for positions.

***

## Privacy Market

### Why privacy matters in DeFi

Public blockchain DeFi has a fundamental problem: every position, every trade, every liquidation threshold is visible to anyone. This creates:

* **Front-running:** Bots watch liquidation thresholds and exploit them
* **Competitive intelligence leakage:** Institutional players don't want competitors seeing their positions
* **Personal financial exposure:** Individuals don't want their net worth and borrowing behavior public
* **Regulatory uncertainty:** Some jurisdictions treat DeFi activity differently based on public visibility

### Privacy in crypto — 2026 state

Zero-knowledge proofs have moved from experimental to practical infrastructure:

* Proof generation is orders of magnitude faster than 2022 — GPU/FPGA-accelerated provers produce basic proofs in milliseconds
* ZK has gone from research tool to production infrastructure (Starknet, zkSync, Aztec, etc.)
* The regulatory conversation has shifted toward "selective transparency" — private by default, auditable on request

### Stellar's privacy position

Stellar launched **Protocol X-Ray** in January 2026, making it uniquely positioned:

| Feature                      | Detail                                                                                                              |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------- |
| **ZK proof verification**    | Noir circuit proofs verifiable inside Soroban smart contracts                                                       |
| **Stellar Private Payments** | Open-source framework: private deposits, transfers, and withdrawals using Groth16 ZK proofs                         |
| **Compliance hooks**         | Association Set Providers (ASPs) enable selective disclosure to regulators — "open by default, private when needed" |
| **Protocol 24 roadmap**      | Confidential assets are the next milestone — Stellar views privacy as a multi-year buildout                         |

Stellar is the only major blockchain with ZK privacy infrastructure that is simultaneously **compliance-friendly**. This is critical for institutional adoption.

***

## Stellar Ecosystem

### Key metrics (2025–2026)

* **USDC volume:** \$500M/month on Stellar — the dominant stablecoin, real usage not speculation
* **Network operations:** Surpassed 1 billion network operations in Q3 2025
* **Soroban maturity:** Smart contracts moved from early experimentation to production-grade deployments
* **RWA tokenization:** Hit \$3B target set by SDF
* **Protocol 23 (Whisk, Sep 2025):** Parallel smart contract execution — significantly faster network

### DeFi protocols on Stellar

| Protocol     | Type                 | BTC support   | Privacy |
| ------------ | -------------------- | ------------- | ------- |
| Blend        | Lending (Aave-style) | No            | No      |
| Stellar DEX  | Native AMM           | No native BTC | No      |
| Various AMMs | Soroban-based        | No            | No      |

**Gap:** There is no protocol on Stellar that handles real BTC as collateral or for trading. The entire BTCfi category is empty on Stellar.

### USDC + Stellar = unique combination

USDC is the world's most regulated and trusted stablecoin. On Stellar, USDC is natively issued by Circle — not bridged. This means:

* No bridge risk on the USDC side
* Stellar USDC is the same USDC that businesses already use for payments, remittances, and treasury
* Users borrowing USDC on Writz are getting a real, liquid, institutionally recognized asset

This combination — real BTC collateral + real USDC output — makes Writz Protocol's value proposition immediately understandable to mainstream financial players.

***

## Competitive Analysis

### Direct competitors to Writz Protocol

Nobody is building exactly what Writz is building. The closest analogues are:

**On privacy + DeFi:** Aztec Network (Ethereum), Penumbra (Cosmos) — but none handle BTC natively and none are on Stellar.

**On BTCfi:** Stacks, RSK, Interlay — but none have ZK privacy and none are on Stellar.

**On Stellar DeFi:** Blend — but no BTC support and no privacy.

### Indirect competitors

| Competitor   | Why they're indirect                        | Writz advantage                      |
| ------------ | ------------------------------------------- | ------------------------------------ |
| WBTC on Aave | Custodial bridge, no privacy, Ethereum fees | Trustless, private, Stellar low fees |
| tBTC         | Complex threshold bridge, no privacy        | Simpler UX, ZK privacy               |
| Blend        | On Stellar, but no BTC                      | Same ecosystem + BTC + privacy       |
| Stacks sBTC  | Bitcoin-native, but no privacy, no Stellar  | ZK privacy, USDC output              |

### The competitive moat

Writz's moat is **technical first-mover advantage in a specific niche**:

1. First Bitcoin SPV client on Soroban — takes 12–18 months to build and audit
2. First integration of Stellar's ZK privacy (Protocol X-Ray) with BTC collateral
3. Open SDK creates ecosystem lock-in — once Stellar wallets/protocols build on Writz SPV, switching is costly

***

## Market Sizing

### Total Addressable Market (TAM)

**BTCfi TAM:** $8.6B TVL and growing. If Writz captures 5% of BTCfi TVL by 2028, that is $430M+ in TVL. Protocol revenues at 1–2% annualized on TVL = $4.3M–$8.6M/year from lending alone.

**Privacy DeFi TAM:** The privacy DeFi category is emerging. Aztec raised $100M. Penumbra raised $23M. The market for private financial infrastructure is early but large.

**LATAM remittances (future product):** \$150B/year market where Stellar already has distribution. BTC→USDC private remittances would be a natural extension after the core protocol is established.

### Serviceable Addressable Market (SAM)

Near-term realistic targets:

* Bitcoin holders on Stellar-adjacent ecosystems (existing Stellar users with BTC)
* Privacy-conscious individuals in LATAM with BTC savings
* Crypto-native companies needing ZK Proof of Reserve (post-FTX demand is structural)
* Stellar DeFi protocols wanting BTC exposure

***

## Timing Assessment

**Why now:**

1. Protocol X-Ray launched January 2026 — the ZK infrastructure is production-ready TODAY
2. BTCfi is in a growth phase — early but proven market
3. Stellar has real USDC liquidity — not a chicken-and-egg problem on the output side
4. Soroban has matured — Protocol 23 brought parallel execution; smart contracts are production-grade
5. The summa-tx Rust SPV library exists — no need to build cryptographic primitives from scratch

**Window:** 12–18 months before a well-funded competitor could plausibly replicate the SPV + ZK combination on Stellar. The first-mover in a niche this specific tends to hold the position.

***

*Last updated: 2026-06-22*