What is Bitcoin Private?

Bitcoin Private (BTCP) forked from Bitcoin on February 28, 2018. It combined Bitcoin's codebase with Zcash's zk-SNARKs privacy technology. The goal was to create a truly private Bitcoin — fast, cheap, and anonymous transactions.

Technical Specifications

  • Block size: 2 MB (vs Bitcoin's 1 MB)
  • Mining algorithm: Equihash (GPU mineable)
  • Privacy: zk-SNARKs for shielded transactions
  • Block time: 2.5 minutes
  • Total supply: 21 million (same as Bitcoin)

The Supply Discrepancy Scandal

In 2018, a major scandal erupted. An anonymous developer discovered that the BTCP team had secretly increased the total supply from 21 million to 20.4 million (the pre-mine plus extra coins). This was not disclosed to the community. The developer who discovered this was allegedly threatened by the team.

Current Status

  • Market cap: Approximately $5-10 million (as of 2026)
  • Price: $0.50-1.00 (down from ATH of $65 in 2018)
  • Adoption: Virtually none. The project is considered dead
  • Development: No active development

Why Bitcoin Private Failed

  1. Scandal: The supply discrepancy destroyed trust
  2. Competition: Better privacy coins (Monero, Zcash) dominated
  3. Team issues: Internal conflicts and legal problems
  4. No adoption: No merchants or exchanges support BTCP

SEBI Disclaimer

This article is for educational purposes only. Cryptocurrency investments are subject to market risks.

How the Privacy Fork Was Born

Bitcoin Private (BTCP) launched on 2 March 2018 as a fork that combined Bitcoin with Zclassic, itself a fork of Zcash. The pitch was simple: take Bitcoin's network, liquidity and brand, then wrap every transaction in zero-knowledge proof technology. Where Zcash left shielded (private) addresses as an option, BTCP proposed that privacy be the default route, so a user sending funds would not have to think about which address type they were using.

The fork snapshot occurred at Bitcoin block 511346. Holders of both BTC and the Zclassic chain shared in the new coin, which is why the early supply was roughly double what a single-chain fork would have produced. Zclassic was chosen deliberately because it had no founder reward, a property that let the team argue the fork was cleaner than Zcash itself.

Privacy Mechanics: Shielded Addresses and zk-SNARKs

BTCP inherited the Sapling-era zk-SNARK cryptography, the same proof system that powers private transactions on Zcash. A shielded transaction works like this:

  1. The sender commits a value to a Merkle tree called the note commitment tree.
  2. A zk-SNARK proves the note exists and is unspent, without revealing which note it is.
  3. Each note carries a nullifier that is published when spent, preventing double spending without linking the two transactions.

The cryptographic detail most users overlook is the witness cost. In the early Sapling design, each new note added a commitment to a tree, and older note witnesses grew more expensive to update the further back in the tree they sat. That practical engineering constraint, later relaxed across Zcash-era wallets, is why "privacy by default" chains historically asked for faster hardware than public chains.

BTCP Against Its Privacy Peers

Putting BTCP side by side with Monero and Zcash shows why it never held a niche:

  • Monero: works on ring signatures, trusts no third-party parameter baking, but has larger transaction sizes.
  • Zcash: selective disclosure, so an auditor can verify a payment while the public ledger stays opaque.
  • BTCP: promised Bitcoin-branded privacy, but shipped weaker coin-control tooling than either peer.

By late 2019, most trading pairs for BTCP were on thin books. The coin's own development cadence slowed, and the fork became a case study in why a privacy token needs distribution, not just cryptography.

Liquidity and Listing Reality

The practical problem for retail buyers was never the cryptography, it was the exits. A 2018-era coin like BTCP could only be parked on a handful of mid-tier exchanges that enforced unreliable withdrawal processing. When a chain's primary exchanges are minor venues, the bid-ask spreads widen to 1-3%, and a market order to sell into weakness routinely costs you more than a year of mining revenue on a modest GPU.

  • Depth rarely exceeded a few BTC-equivalent units per level outside listing events.
  • Fee schedules on smaller venues made dollar-cost-averaging in and out impractical.
  • Wallet software lagged upstream changes, which repeatedly broke users mid-coin-swap.

Lessons for Privacy-Fork Buyers

Whether you ever touch a fork again, the BTCP story compresses into four checks worth running before any speculative crypto purchase:

  1. Confirm the supply mechanics at snapshot: how many chains share the fork, and to whom.
  2. Verify the post-fork maintainer: is there funded open-source work, or a one-off release?
  3. List the realistic venues: would you actually be able to sell a meaningful position?
  4. Read the dispute record: forks that begin with angry disagreements rarely get quieter.

Privacy is a property a network is paid for every day, not a launch-time marketing bullet. Bitcoin Private demonstrated the phrase "privacy coin" can mean very different things to a cryptographer and to a trader, and that difference is where most of the money in this space is lost.