Bitcoin 21 (XBTC21)
Bitcoin 21 ranks #428 of 484 cryptocurrencies. On a list that also counts tokens, memecoins, wrapped coins, staked derivatives and stablecoins it appears at #5488: 5060 of the 5487 assets ahead of it are not native coins but tokens or claims. A token is issued on a host blockchain rather than running its own; a claim stands for an asset already counted.
| CoinSpectrum Grade | pending — no market data |
|---|---|
| Rank among cryptocurrencies | #428 |
| Rank counting claims | #5488 |
| Price | $0.00326 |
| Circulating supply | 0 XBTC21 |
| Maximum supply | no fixed cap |
| Consensus family | Hybrid |
| Consensus mechanism | SHA-256 PoW + PoS |
| Own hashrate | — |
| Network purpose | Payments |
| Ledger type | Single-asset ledger |
Market figures from the 10 November 2026 build. Open the live view for every exchange's price, and charts.
CoinSpectrum Grade (Source)
Grade pending. No market cap or no daily volume is reported for Bitcoin 21 by any source the site reads. A grade is not given until it is, so that a coin is never rated higher for what is not yet known.
| Section and criteria | Score | Basis |
|---|---|---|
| Consensus | 4.5 | average of 2 criteria |
| By leader (its largest chain's market cap) (Source) | 4.5 | Hybrid: 4.5 of 10 on the ladder of consensus families ranked by their largest chain's market cap |
| By family (all its chains' market cap) (Source) | 4.5 | Hybrid: 4.5 of 10 on the ladder of families ranked by the combined market cap of their chains |
| Supply | — | Supply not reported |
| Distribution | 5.6 | average of 2 parts |
| Holder concentration (Source) | – | Not yet measured |
| Active addresses | – | Not yet measured |
| Premine (allocated at launch) | 1.1 | 88.8% of today's supply allocated at launch to founders, a company, a foundation or investors. The ANN and README allocate a 6.3M premine in three 2.1M batches (1M '21 team', 1.1M IPO/ICO, 1M 'UK/HM Treasury', 1.1M 'UN/accepting countries', 2.1M poverty and humanitarian vaults); CoinMarketCap lists 7,093,108 total supply, so 6.3M / 7.09M = 88.8%. source |
| Fundraising (share sold) (Source) | – | Sold by its issuer or insiders: share sold not yet researched. Up to 1.1M (15.5% of supply) was offered in an 'IPO/ICO' until the first exchange listing; the amount actually sold is not published. IPO/ICO of up to 1.1M premined coins (also covering faucets and giveaways), announced December 2015; launch 2016-04-17. Price and proceeds not disclosed. source |
| Developer share (after launch) | 10 | No developer share: every new coin goes to the miners or validators who produce blocks. No dev share in block rewards is described; allocations were all premined. source |
| Decentralisation | 4 | average of 2 parts |
| Governance (Source) | – | Not yet researched |
| No central team (Source) | 0 | A central team directs it: Single-team project (bitcoin21 GitHub account, 'Bitcoin 21 Foundation'); no licence file confirmed. source |
| Who can mint (Source) | 8 | Open, with a stake vote: anyone can mine, and stakeholders vote on the blocks |
| Nodes (Source) | – | Not yet counted |
| Security | — | 1.3 of 2 points, 6 not yet measured source |
| Pool diversity (Largest pool 50% 0 to 20% 10, largest three 90% 0 to 50% 10; 2 points) | – | |
| Network activity (Transactions a day, 250 0, 500,000 or more 10; 2 points) | – | |
| Hashrate (Own work 5, its power 1 kW 0 to 10 GW 5; 1 point) | – | |
| Clients (Separate code and teams 10, separate code or teams 9, a fork by the same team or a stale second 8; one client: a new version within 12 months 7, 24 months 6, none in 24 months 5, none in 48 months 3; a second in development +0.5, a second seen running +1, 8 at most with one client; chain ended 0; 1 point) | 3 | one client, never released as a version; no change to the code since Apr 2016 |
| Open source (Node software) | – | |
| No 51% attack (Nor a deep reorganisation, five years) | ✓ | |
| Scalability | 4.8 | average of 4 parts source |
| Fees ($0.001 or less 10, $1 or more 0) | – | not yet measured |
| Throughput (2,478 a second, the busiest network's peak day, 10; 121, the median of the ten busiest, 5) | 3.3 | about 42.1 simple transactions a second |
| Block time (10 minutes 10, less either side) | 8.4 | a block every 3.5 minutes |
| Block space per 10 minutes (24 MB or more 10: the ten busiest networks' median demand, 16.4 MB, and half again for growth) | 7.4 | 2 MB limit, 5.71 MB per 10 minutes |
| Features (3 checks) | 0 | 0 of 2 passed, 1 not yet researched |
| Fast payments (Safe to accept within seconds · Whitepaper abstract, §1, §2 and §11) | – | Client base not established; 210-second PoW/PoS blocks. |
| Pruned nodes (Old history dropped, every rule checked · Whitepaper §7) | ✗ | Bitcoin 21 source (Apr 2016): no -prune option; the node keeps the full block history. |
| Light clients (Payments verified from headers · Whitepaper §8) | ✗ | Bitcoin 21 source (Apr 2016): hybrid PoW/PoS chain; stake blocks cannot be checked from headers without the UTXO set and the protocol has no light-client proof scheme. |
| Privacy | 7 | 7 of 10: whitepaper privacy 7 of 7, extra features 0 of 3, 1 not yet researched source |
| Protocol level privacy (Keys not tied to an identity · Whitepaper §10) | 10 | Bitcoin 21's Bitcoin-derived node (bitcoin21/v1.0) has no identity rule: anyone generates keys and receives and sends the coin. |
| UTXO ledger (Separate outputs, change to a new address · Whitepaper §2, §9) | 10 | Coins are separate unspent outputs: a payment spends whole outputs and sends the change to a new address, so the coins in one wallet need not share a history. |
| HD addresses (A new address for each payment, unlinked · Whitepaper §10) | – | |
| Hidden amounts (Amounts confidential) | 0 | Bitcoin 21 source (Apr 2016): Bitcoin-style transparent outputs; no confidential amounts. |
| Hidden parties (Sender and receiver hidden) | 0 | Bitcoin 21 source (Apr 2016): Bitcoin-style transparent addresses; no ring signatures, zero-knowledge spends or stealth addresses. |
| Network privacy (Origin hidden by default) | 0 | Bitcoin 21 source (Apr 2016): no Dandelion relay in the node; Tor is only an optional proxy setting (-tor/-onion) the user must configure. |
| Programmability | 1.1 | 1 of 9 points source |
| Token issuance | 0 | No token issuance on the chain itself |
| Smart contracts (Scripting for spending conditions) | 1 | Bitcoin 21 source (Apr 2016): Bitcoin-style Script (signatures, hashes, CHECKMULTISIG) limited to spending conditions; no contract platform. |
| Multisig and time locks (Without a third party) | ✗ | Bitcoin 21 source (Apr 2016): CHECKMULTISIG is present, but the script interpreter has no OP_CHECKLOCKTIMEVERIFY or OP_CHECKSEQUENCEVERIFY (the code base predates BIP65/BIP112), so no output can be time-locked. |
| Atomic swaps (With other chains) | ✗ | Bitcoin 21 source (Apr 2016): without a lock-time opcode Script cannot express the refund branch of an HTLC, and no adaptor-signature swap exists for the coin. |
| Native DEX (Trades the coin itself, not a claim) | ✗ | No DEX found trading the coin itself: none on its own chain (DefiLlama), and not on THORChain, Maya, Chainflip, Komodo DeFi, BasicSwap, Bisq or Haveno (checked 2026-11-04). |
| Cross-chain messaging (Verified by the chain itself) | ✗ | Bitcoin 21 source (Apr 2016): no cross-chain message or light-client verification in the protocol. |
| NFTs (Carried by the chain's rules) | ✗ | Bitcoin 21 source (Apr 2016): no token or NFT type in the consensus rules. |
| Demand | 0.5 | average of 2 measures |
| Exchanges (10 or more: 10) | 0 | no exchange the site reads trades it |
| Daily volume ($10K 0, $1B or more 10) | – | no volume reported |
| Turnover (volume ÷ market cap, 5% a day: 10) | – | not measured |
| Order-book depth (±2% of the price ÷ market cap, 1%: 10) | – | not measured |
| Market cap ($1M 0, $10B or more 10) | – | not measured |
| Paper trading (futures, options and margin ÷ market cap, 0%: 10, 100%: 0) | – | not measured |
| Wallet support (wallets that hold it, 10 or more: 10) | 1 | its own node and wallet, counted as 1: no wallet in the site's directory lists it yet |
| Record | 6.7 | average of 3 criteria |
| Age (years since genesis) (Source) | 10 | 10 full years since 2016-05-05, the first day with a recorded price (genesis not yet researched, so the age can only be understated). |
| Development (work, fixes, vulnerabilities) | 0 | 0 positive, 3 negative source |
| Negative | ||
| Steady work, 0 of 6 | ✗ | 0 commits in 0 of the last 12 months (github.com/bitcoin21/v1.0); The bitcoin21/v1.0 repository has had no commit since 2016-04-17 (launch day) and no releases. |
| Unfixed vulnerability, disclosed 2024-07-03, −1 | ✗ | CVE-2020-14198: misbehaving peers are auto-banned into an unbounded ban list, so many attacker addresses can exhaust memory; still in Bitcoin 21 HEAD. bitcoincore.org github.com |
| Unfixed vulnerability, disclosed 2024-07-31, −1 | ✗ | CVE-2024-52919: addr-message spam can overflow the address manager's 32-bit id counter and crash the node, with no addr rate limit; still in Bitcoin 21 HEAD. bitcoincore.org github.com |
| Conduct (origin, claims, halts) | 10 | 3 positive, 0 negative source |
| Positive record | ||
| Launched with a stated purpose, not as a joke | ✓ | |
| No claims by its founders that contradict its own design | ✓ | |
| No halt, freeze or reversal in five years | ✓ | |
Ten sections, weighted equally, each 0 to 10: consensus (the two ladders), supply (the supply scale and a fixed cap that holds), distribution (premine, fundraising, developer share, holders), decentralisation (governance, no central team, who can mint, nodes), security, scalability, privacy, programmability (what the scripting layer can do beyond the whitepaper's payment system), demand, and record (age, development, conduct). They are built from the criteria in the second table: privacy, scalability, security and decentralisation are the Cryptocurrency Standards among them, as follows: privacy (the whitepaper's three checks a base of 7 of 10, three extra features up to 3 more), scalability (four measures and three features), security (pool diversity, network activity, hashrate, clients and two checks) and decentralisation (governance, no central team, who can mint, nodes, holders, premine, fundraising and developer share); programmability (token issuance, smart contracts and five checks) follows them, and supply and demand are two: the supply, scored against 21 million, and demand, the average of seven measures of the market and the wallets. Provisional: parts marked — are not yet measured and are left out of the average. A rating of structure and market depth, not a price forecast or investment advice. How the grade is built · Highest-graded cryptocurrencies.
Hybrid coins
Conflux CFXA
Decred DCRA
Zano ZANOB
Swing SWING
BERNcash BERN
2GIVE 2GIVE
PlatinumBAR XPTXAll Hybrid chains →Proof of Work coins
Bitcoin BTCA+
Zcash ZECA+
Dogecoin DOGEA+
Monero XMRA+
Bitcoin Cash BCHA++
Litecoin LTCA+
Ethereum Classic ETCAAll Proof of Work chains →Supply
0 XBTC21 are in circulation, against no fixed cap — issuance has no defined end.
Launch and allocation
| Premine (allocated at launch) | 88.8% of today's supply |
|---|---|
| Developer share received since launch | 0% of today's supply |
| Developer share of new coins today | 0% |
| Fundraising | Public sale |
The ANN and README allocate a 6.3M premine in three 2.1M batches (1M '21 team', 1.1M IPO/ICO, 1M 'UK/HM Treasury', 1.1M 'UN/accepting countries', 2.1M poverty and humanitarian vaults); CoinMarketCap lists 7,093,108 total supply, so 6.3M / 7.09M = 88.8%.
IPO/ICO of up to 1.1M premined coins (also covering faucets and giveaways), announced December 2015; launch 2016-04-17. Price and proceeds not disclosed.
Up to 1.1M (15.5% of supply) was offered in an 'IPO/ICO' until the first exchange listing; the amount actually sold is not published.
No dev share in block rewards is described; allocations were all premined.
Premine batches are labelled for 'UK/HM Treasury' and 'UN/accepting countries', with no evidence of any arrangement with those bodies. Market cap about $2.6k; the chain appears dead.
Sources: bitcointalk.org · github.com · coinmarketcap.com. Researched 2026-10-26, low confidence.
The work behind it
No source we can reach publishes a hashrate for Bitcoin 21.
What a regulator has said
No SEC/CFTC determination — unclassified.
The regulator's position, reported as stated, not CoinSpectrum's. Assets nobody has ruled on are left unclassified rather than sorted by a guess.
How CoinSpectrum ranks Bitcoin 21
Bitcoin 21 is #428 among cryptocurrencies and #5488 in the market ranking, which lists wrapped coins, staked derivatives, stablecoins and tokens alongside them. CoinSpectrum counts an asset once, and counts only cryptocurrencies: assets with their own blockchain and their own consensus. A wrapped coin, a staked derivative or a stablecoin is a claim on something already counted; a token, memecoin or otherwise, runs on another chain's blocks. All of them are listed, each in its own section, and none is added to the total. The 5060 places between Bitcoin 21's two ranks are held by claims and tokens, not by other networks. The methodology sets out the rule and the counting rule argues for it.
The price above is the median of the exchanges the site reads live, checked every minute and cross-checked against a market snapshot (how market data is gathered). The grade is scored on published criteria, each with its source (the method). The site is independent, nothing on it is a paid placement, and its statements are signed (about CoinSpectrum, the manifesto).