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Tezos is a public smart-contract blockchain with XTZ, also called tez, as its native asset. It uses proof of stake and a formal process for proposing and adopting protocol changes. As of October 8, 2026, current documentation and 2026 upgrade announcements show an active ecosystem that includes the base chain and rollups such as Etherlink.
Why upgrades are central to Tezos
The project's distinctive idea is that a blockchain should have a structured way to change its own rules. Participants can propose protocol amendments and vote through the network's governance process. This gives upgrades an established path rather than leaving every change to an entirely informal agreement.
The process does not mean the software governs itself without people. Developers write and test proposals, bakers participate in voting, and users decide which software and services to rely on. Governance can organize disagreement; it cannot eliminate technical bugs or guarantee that every proposal is desirable.
Tezos launched in 2018. Its history should not be reduced to an old fundraising narrative or a claim that it will become the last cryptocurrency. The more useful question is whether its upgrade process can support changes while preserving understandable rules for users and developers.
Baking, staking and delegation
Validators on Tezos are called bakers. They participate in producing and attesting to blocks, with stake supporting their consensus role. Users who do not operate infrastructure can participate through delegation and staking, but those terms describe different arrangements.
Delegation assigns participation rights without giving the baker the ability to spend the delegator's funds. Staking commits funds under the protocol's staking rules, including the applicable unstaking process and exposure to penalties. A user should not assume that a wallet's delegate button and stake button have identical consequences.
The current documentation treats delegation as a prerequisite for staking and explains that staking is the main reward route. Older tutorials describing only liquid delegation may therefore omit important current behavior. Reward rates, baker policies and timing need to be checked against the current protocol and service.
What XTZ is used for
XTZ pays for network activity and underpins the staking economy. It is a native coin, separate from the application tokens and non-fungible tokens that contracts can create. Holding it does not automatically grant ownership of applications, a share of an organization's profits or a fixed yield.
Tezos has protocol issuance rather than a Bitcoin-style permanently fixed supply. The rules have evolved through upgrades. A tokenomics description needs to distinguish issuance, staking participation and fees; a nominal reward rate does not by itself measure an economic gain after dilution and price changes.
Smart contracts and verification
Tezos supports smart contracts and development languages that compile into the network's execution environment. Its emphasis on formal verification concerns methods for proving that code satisfies specified properties. This can improve assurance, but a proof is only as meaningful as the property being proved and the assumptions behind it.
A correctly implemented contract can still embody an economically poor design. An external price feed can fail, permissions can be misused, or an interface can mislead users. Formal methods should therefore be understood as part of engineering, not a blanket guarantee that every Tezos application is safe.
Etherlink and the rollup ecosystem
Tezos documentation describes Smart Rollups and a Data Availability Layer that support execution beyond the base chain. Etherlink adds an Ethereum-compatible environment using Tezos rollup technology. This lets familiar EVM tools participate in the broader ecosystem while introducing the operational considerations of a separate execution layer.
The 2026 Ushuaia announcement describes changes to rollup governance and network infrastructure, demonstrating how the architecture continues to evolve. Rollup upgrades, bridges and withdrawal paths should still be assessed individually. An asset held on the base chain and its representation on an execution layer are not simply two views of the same wallet balance.
What matters in practice
For an XTZ holder, the first questions are where the asset is held, whether it is delegated or staked, and what conditions apply to moving it. For an application user, the relevant questions include the execution layer, contract permissions and bridge dependencies. An exchange's token listing does not answer either set.
Tezos is best understood through that combination of participation and change: users interact with a network whose upgrade mechanisms are part of its design. The comparison with Qtum's staking architecture shows why two proof-of-stake networks can still differ substantially in transaction handling, governance and user experience.