# 7.1 Token Design Overview
To build a sustainable and well-balanced ecosystem, SyFu adopts **two on-chain tokens** and **one in-app currency**.
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### SFT (Ecosystem Token)
A long-term token designed to accumulate value across the ecosystem.\
It is structured around long-term holders and community contribution.
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### EVT (Excavation Token)
A utility token “excavated” through users’ everyday activity by **BINDing payment data**.\
It directly connects to gameplay and NFT utility.
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### Econ (In-App Currency)
Econ is an **in-app currency** used inside the SyFu app.\
It powers core game actions such as NFT growth, repairs, check-in recovery, and opening lucky bags.
* Econ is **managed as an in-app balance**
* Econ is **not tradable externally**
Econ can be purchased within the app or on the **SyFu Marketplace (at a discounted price)**.
* **Credit card: available**
* **EVT / BNB / SFT: coming soon**
👉 To purchase Econ, please visit the SyFu Marketplace:\
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By separating roles, we achieve both **smooth in-game usability (instant experience)** and **ecosystem stability (supply balance)**.
*Note: The Lucky Bag feature is currently not available. It will be released gradually after the Mainnet β (Open Beta) launch, alongside other features.*
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