Syscoin (SYS) is the native asset of a network that combines a SHA-256 proof-of-work UTXO base chain with NEVM, an EVM-compatible environment for smart contracts. Miners can merge-mine Syscoin alongside Bitcoin, and SYS is used for NEVM gas and network incentives. Older material lists an 888 million SYS cap, but that figure predates the project’s dynamic supply model.
| Stat | Value |
|---|---|
| Ticker | SYS |
| Price | $0.001832 |
| Market Cap | $1.69M |
| 24h Change | -10.60% |
| Circulating Supply | 922.424M SYS |
| Max Supply | No fixed maximum (∞) |
| All-Time High | $1.30 |
| Total Supply | 922.431M SYS |
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How Syscoin is structured
Syscoin has two execution environments with different designs. Its base chain uses a Bitcoin-style UTXO model and SHA-256 proof of work. Miners can merge-mine Syscoin alongside Bitcoin, so they can use the same work to secure both networks; Syscoin remains a separate blockchain with its own rules. NEVM is the network’s EVM-compatible environment for Solidity contracts, where SYS is used for gas. The project has also described data-availability and rollup components, including PoDA and Rollux. Its newer Gateway and zkSYS Genesis plans are presented as a settlement layer and a ZK rollup testnet; a testnet announcement does not establish that the design is already a production mainnet service.
Tokenomics and the old 888 million figure
Older Syscoin material described a maximum of 888 million SYS. That number belongs to an earlier supply design. The project’s NEVM-era explanation says the move to an EIP-1559-style model removes the fixed cap: base fees on NEVM are burned, while block and service-provider rewards can add SYS. The result is a supply that can grow or shrink depending on issuance and burns, not a hard-capped asset. CoinGecko’s current listing reports about 922.424 million SYS circulating and about 922.431 million total, with no fixed maximum. The market table is a dated live snapshot and may change.
Bridge incident and the limits of status claims
Syscoin’s postmortem says an exploit on 7 June 2026 released 5 billion SYS through a UTXO-to-NEVM bridge interpretation mismatch. The team reported that the funds were returned and burned. Its June postmortem said the bridge remained paused during review. A later Liberty v5.1.0 release announced Bridge V2 with stricter proof validation and an expected activation around 17 August 2026. Those are dated announcements; they do not by themselves confirm the bridge’s present operating status. The incident is a reminder that cross-chain verification is a separate security surface from the base chain’s mining consensus.
What SYS does and does not mean
SYS is used for fees and network incentives, but a market-price table does not measure network security, developer activity or demand for Syscoin’s data services. Merge mining also does not make SYS interchangeable with BTC: the assets, blockchains and governance processes remain distinct. Before using a bridge, check its current official status and supported routes rather than assuming that an announced upgrade means every route is open.
Related Terms
See Also
- How Do Crypto Bridges Work — And Why Are They Such a Hack Target?
- Bitcoin as Collateral: Bank Loans, Mortgages, and DeFi Explained
- Are Layer 2 Networks Actually Decentralized?
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Sources
- Syscoin’s NEVM and supply-design explanation — The project describes fee burning, continued issuance and removal of the former 888 million SYS ceiling.
- Syscoin’s June 2026 bridge postmortem — The postmortem documents the exploit, recovery and burn, and the bridge pause reported in June.
- Syscoin Liberty v5.1.0 release notes — The release describes Bridge V2 validation changes and its announced August 2026 activation schedule.
- Syscoin market and supply data on CoinGecko — The live listing provides the market snapshot and confirms SYS supply exceeds the former 888 million cap.