# Introduction to aBTC

## aBTC: Liquid Bitcoin Token on Aptos

aBTC is a cross-chain, liquid Bitcoin token backed 1:1 by BTC assets.

aBTC facilitates DeFi interoperability within Aptos for Bitcoin, enabling users to earn real yield within ecosystems like Aptos, and will be fully supported across the Aptos DeFi network.

With aBTC, holders earn native-yield from Aptos, Bitcoin Layer 2 & Echo rewards, and the liquidity to use aBTC across DeFi. aBTC can be used as collateral in numerous lending and borrowing protocols, across perp DEXs, and more.

## Unique features of aBTC

* **Earns native yield + rewards:** aBTC earns native yield from Aptos, Bitcoin Layer 2 & Echo   Points and can be used across DeFi to maximize returns.
* **First native liquid restaking token on Aptos:** Collaborate with Bitcoin Layer 2 solutions to bridge Bitcoin liquid restaking assets to Echo, where aBTC is natively minted within the Move ecosystem.
* **Liquid & DeFi compatible: a**BTC, backed 1:1 with BTC, can be used as collateral in lending and borrowing protocols, perp DEXs, and more.

## Benefits of aBTC

* **aBTC holders retain the liquid value of their BTC**
* **aBTC holders passively accrue multiple layers of yields:**
  * Aptos Yield Incentives of up to 12% (provided by Aptos)
  * Bitcoin Layer 2 + Echo Points
  * Incentives from aBTC destination chains and protocols
* **aBTC holders can earn even more by deploying their aBTC into DeFi**
  * Providing liquidity on Decentralised Exchanges
  * Lending aBTC or borrowing against it
  * Executing yield trading strategies
  * Committing aBTC to automated yield-generating vaults


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