What Is Wrapped Token in Crypto?

A wrapped token is an ERC-20 (or equivalent) representation of another asset — either a non-native crypto asset brought onto a different chain, or a native asset adapted to a specific token standard. Wrapped Bitcoin (WBTC) brings BTC onto Ethereum; Wrapped Ether (WETH) converts native ETH into a standard-conforming ERC-20 that DEX contracts can handle.

Also known as: wrapped crypto, wrapped asset

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Why wrapping exists

Two distinct needs:

Standard conformance. Native ETH on Ethereum isn’t an ERC-20; it predates the standard. Most DeFi contracts expect ERC-20 interfaces. WETH is a wrapper that lets you deposit ETH, receive a 1:1 ERC-20 representation, and use it anywhere an ERC-20 works. Wrap/unwrap is permissionless and instant.

Cross-chain movement. Bitcoin has no smart contracts, so you can’t use native BTC in DeFi. WBTC (and cbBTC, tBTC) solve this by locking BTC with a custodian and minting an ERC-20 on Ethereum. Each WBTC is backed 1:1 by a real BTC held by BitGo (for WBTC) or the issuer’s reserves. Burn WBTC, get real BTC back.

Major wrapped tokens

  • WETH — wrapped native ETH. ~4M ETH typically wrapped. Used in virtually every DEX trade on Ethereum.
  • WBTC — Bitcoin on Ethereum. Peaked at ~300k BTC wrapped; still the dominant Bitcoin-on-Ethereum representation.
  • cbBTC — Coinbase-issued Bitcoin wrapper, gaining share since its 2024 launch due to Coinbase’s trust profile.
  • wstETH — wrapped stETH, the non-rebasing version suitable for DeFi integration.
  • Native USDC on L2s — when Circle issues USDC directly on a new chain (Arbitrum, Base), it replaces the older bridge-wrapped USDC. Superior because it eliminates bridge risk.

Risks and considerations

The failure modes depend on the wrapping mechanism:

  • Custodial wrappers (WBTC, cbBTC) — the issuer holds the backing asset. You trust the custodian and their attestation process.
  • Bridge-wrapped tokens — the backing is locked in a bridge smart contract. Bridge exploits (Ronin, Wormhole, Multichain) can destroy the backing, rendering the wrapped token worthless.
  • Algorithmic wrappers (stETH, wstETH) — backed by a protocol’s underlying mechanism. stETH is 1:1 backed by real staked ETH, but has historically traded at small discounts during liquidity stress (June 2022 saw stETH trade at ~0.95 ETH for weeks).

Before using a wrapped token, check: who issues it, what backs it, and how redemption works. For cross-chain moves, strongly prefer native issuance (Circle’s native USDC) or canonical rollup bridges (Arbitrum’s official USDC) over third-party bridge wrappers. The decade of bridge exploits demonstrates that wrapping adds real risk — not just friction.

Related terms

Bridge A bridge is a protocol that moves assets or messages between two blockchains. Stablecoin A stablecoin is a crypto asset designed to maintain a stable value relative to a reference asset — usually the US dollar. Restaking Restaking is the practice of using staked ETH (or a liquid staking token derived from it) to secure additional protocols beyond Ethereum itself.