What are Wrapped Tokens?

Wrapped cryptocurrencies are digital tokens that act as “bridges” between blockchains, allowing a cryptocurrency native to one blockchain to function on another. Bitcoin, for example, can’t natively interact with Ethereum’s smart contracts, but Wrapped Bitcoin (WBTC) lets it “travel” to Ethereum as an ERC-20 token.

This is done by locking the original asset (BTC, for example) in a secure reserve managed by a custodian or a decentralized protocol and minting an equivalent wrapped version (WBTC, in this case) on the target blockchain. The two are pegged 1:1, so 1 WBTC is meant to equal 1 BTC in value.

In this article, we’ll explore the mechanics, risks, and role that wrapped currencies have in decentralized finance.

What is Wrapped Crypto?

Blockchains often operate like isolated islands, each with rules and assets. Wrapped cryptocurrencies bridge these divides, letting you use a token from one chain on another. This simple yet powerful idea solves a critical problem: blockchains’ inability to share assets natively.

Interoperability is important because it transforms broken ecosystems into connected networks. Without it, Bitcoin remains stuck on its chain, without the possibility of joining Ethereum’s DeFi apps. Wrapped tokens fix this, increasing liquidity and flexibility. For example, WBTC lets Bitcoin holders earn interest on Ethereum-based platforms, while Wrapped Ether (WETH) adapts Ethereum’s native token for apps requiring ERC-20 compatibility. These tokens act as universal translators, supporting cross-chain collaboration.

Examples include WBTC (Bitcoin on Ethereum), WETH (Ether wrapped into an ERC-20 token for DeFi compatibility), and Wormhole-wrapped SOL (Solana’s SOL token on Ethereum). These tokens retain the value and functionality of the original asset while opening up new use cases.

The process involves three steps:

1. Locking: The original asset, such as BTC, is deposited into a custodial wallet or smart contract.
2. Minting: A wrapped token, WBTC, in this case, is created on the target blockchain.
3. Redeeming: To reclaim the original asset, the wrapped token is burned, and the locked crypto is released.

WBTC reserves are held by BitGo together with BiT Global, a Hong Kong custody firm tied to Tron founder Justin Sun, under a multi-jurisdictional arrangement announced in August 2024. Coinbase launched its own custodial wrapped Bitcoin, cbBTC, in September 2024. Decentralized designs, like renBTC, used smart contracts to automate locking and minting, reducing reliance on centralized entities, although the original Ren network shut down in December 2022. However, both models share the goal of making isolated blockchains interoperable.

Are Wrapped Tokens the Same as Stablecoins?

No. Unlike stablecoins, which peg to fiat currencies like the U.S. dollar, wrapped tokens are tied to other cryptocurrencies. Stablecoins aim for price stability, while wrapped tokens focus on interoperability. For example, Tether (USDT) mirrors the dollar’s value, but WBTC mirrors Bitcoin’s. Both rely on reserves, but their purposes diverge: stablecoins reduce volatility, while wrapped tokens enable cross-chain utility.

What is Wrapped Crypto Used For?

Wrapped tokens were created to solve a critical problem: blockchains operating in isolation. Before its invention, Bitcoin couldn’t participate in Ethereum’s decentralized finance (DeFi) ecosystem, limiting its utility. The first relevant breakthrough came in 2019 with WBTC, which allowed Bitcoin holders to lend, borrow, or trade their BTC on Ethereum-based platforms like Aave and Uniswap. This marked a turning point, proving that cross-chain interoperability was possible.

Today, wrapped crypto’s primary uses include:

How Wrapped Tokens Work

Wrapping begins by locking your original cryptocurrency in a secure reserve. For example, to create Wrapped Bitcoin (WBTC), you send BTC to a custodian (BitGo and BiT Global, for WBTC) or, before its shutdown, to a decentralized protocol like Ren. These entities hold your Bitcoin in cold storage (offline wallets) or multi-signature smart contracts, safeguarding the asset.

Once locked, the system mints an equivalent wrapped token on the target blockchain. If you lock 1 BTC, you’ll receive 1 WBTC on Ethereum. This token adheres to the destination chain’s standards. WBTC uses Ethereum’s ERC-20 format, making it compatible with DeFi apps like Uniswap. The minting process varies: custodians manually verify deposits, while decentralized systems like RenVM automated it using nodes that cryptographically proved reserves.

This 1:1 peg is very important. Services such as Chainlink Proof of Reserve publish reserve data on-chain, which makes the backing easier to check. Wrapped tokens risk becoming worthless without proper backing.

Role of Custodians and Smart Contracts

Custodians are the gatekeepers. They verify your identity through KYC checks and manually mint or burn tokens. This adds security but introduces delays and trust risks. If a custodian is hacked, WBTC holders could lose funds.

Decentralized systems replace custodians with smart contracts. Take renBTC, the best-known example: you sent BTC to RenVM, which used a network of nodes (“Darknodes”) to validate deposits. These nodes generated cryptographic proofs, so BTC was locked without a single custodian. The contract then auto-minted renBTC on Ethereum. The weak point turned out to be outside the code: Ren’s infrastructure was tied to Alameda Research, and after Alameda collapsed in November 2022 the Ren 1.0 network shut down in December 2022, leaving renBTC holders who had not bridged back unable to redeem.

Smart contracts eliminate human error but carry code risks. A bug in the contract could let attackers drain reserves. However, they enable 24/7 automation and transparency. Anyone can audit the blockchain to confirm a contract-based token’s reserves.

Unwrapping Process

Unwrapping reverses the process. Send WBTC back to the custodian or smart contract to reclaim your Bitcoin. The custodian burns the WBTC, reducing its supply, then releases your BTC from their vault. This makes sure that the 1:1 peg remains intact.

Decentralized systems work faster. With renBTC, burning the token triggered an automated release of BTC within minutes. Custodians, however, might take hours for manual checks. Delays can frustrate users, especially during market volatility.

Once unwrapped, the original asset returns to your wallet. If the system fails here (say, a custodian refuses to release BTC), the wrapped token collapses. This happened in November 2022, when Sollet tokens on Solana issued by FTX and Alameda, such as soBTC and soETH, could no longer be redeemed after FTX’s bankruptcy and lost most of their value.

Use Cases of Wrapped Crypto

From bridging isolated networks to supercharging DeFi strategies, wrapped tokens solve a number of real-world blockchain challenges.

Enhancing Interoperability

Blockchains are like countries with their own currencies and rules. Wrapped tokens act as passports, letting assets travel freely. Cross-chain transactions become easy. Imagine swapping Solana’s SOL for Ethereum’s ETH without a centralized exchange. Wrapped tokens like Wormhole-wrapped SOL on Ethereum make this possible by representing SOL as an ERC-20 token. Traders bypass slow, costly intermediaries, executing swaps directly on decentralized exchanges.

Even NFTs can benefit. Through an NFT-capable bridge, an NFT minted on Ethereum can be represented on another chain and traded on that chain’s marketplaces. This interoperability broadens audiences and liquidity, turning niche collectibles into cross-chain assets. Bridges such as Portal Bridge (built on Wormhole) have offered this for NFTs as well as tokens.

Participating in DeFi

Let’s say you hold Bitcoin but want to earn interest on it. Wrap it into WBTC, deposit it into Compound, and start earning yields. All while keeping exposure to Bitcoin’s price. No need to sell; your BTC works harder on Ethereum.

They’re also widely used as collateral. On MakerDAO (now Sky), WBTC has been accepted as collateral to mint DAI stablecoins. If you need a loan, you can use Wrapped Ether (WETH) as collateral on Aave, borrow USDC, and pay later. This flexibility lets you borrow against assets without selling, which is useful for long-term holders.

Liquidity mining thrives on wrapped tokens. Deposit WBTC and ETH into a Curve Finance pool and earn fees from traders swapping between the two. Yield farmers often work across chains, for example supplying Wrapped AVAX on Avalanche and bridged stablecoins on Polygon, to spread their positions across ecosystems.

But DeFi isn’t risk-free. Always verify audits and reserve transparency. Custodian-backed tokens add counterparty risk, meaning if the custodian fails, WBTC could depeg. Decentralized options remove intermediaries but depend on code reliability.

Popular Wrapped Tokens

Below are key examples, how they work, and the risks that come with them.

Wrapped Bitcoin (WBTC)

WBTC is Bitcoin’s Ethereum avatar. Managed by a consortium (BitGo and, since 2024, BiT Global as custodians, plus approved merchants), it locks BTC in reserves and mints ERC-20 WBTC. Every WBTC is meant to be backed 1:1, and reserve data is published so anyone can check it.

The card below shows WBTC’s current price and market data from our feed.

If you want to lend BTC on Aave, you can convert it to WBTC, deposit, and earn interest. WBTC was the first major Bitcoin token on Ethereum and for years the go-to bridge for Bitcoin into DeFi, though Coinbase’s cbBTC has become a major alternative since its September 2024 launch. But trust matters: BitGo and its custody partner hold the BTC, and if they’re hacked, WBTC could lose its peg. Decentralized alternatives like renBTC used smart contracts instead, but renBTC lost its redemption route when the Ren 1.0 network shut down in December 2022. You can follow the largest bridge protocols on our bridge sector page.

Wrapped Ether (WETH)

Ethereum’s native ETH isn’t ERC-20 compliant, meaning it can’t natively trade on DEXs like Uniswap. WETH solves this. When you swap ETH on Uniswap, the platform auto-converts it to WETH, wrapping it into an ERC-20 format.

The card below shows WETH’s current market data from our feed.

This lets ETH function like any token: stake it in Curve pools, use it as collateral on lending protocols like Aave, or trade it for SHIBA INU.

Wrapped BNB (WBNB)

BNB, in its native form, is not a BEP-20 token: it runs on its own standard. Many decentralized applications (dApps) and DeFi protocols on BNB Smart Chain require BEP-20 compatibility.

The card below shows WBNB’s current market data from our feed.

Wrapping BNB into wBNB makes it usable in smart contracts, similar to how wETH is used on Ethereum. wBNB can be traded on decentralized exchanges like PancakeSwap, where most tokens follow the BEP-20 standard.

Wrapped Versions of Real-World Assets

Tokenized real-world assets (RWAs) are blockchain-based digital tokens that represent ownership of tangible or traditional financial assets, such as real estate, gold, or stocks, allowing fractional ownership, easy trading on decentralized platforms, and integration with DeFi ecosystems while maintaining a direct link to off-chain reserves.

For example, PAX Gold (PAXG) pegs 1 token to 1 oz of LBMA-certified gold stored in Brinks vaults. Where DeFi lending platforms accept PAXG as collateral, you can borrow against gold without selling it. Real estate platforms like RealT tokenize properties, letting you buy small fractions of a rental home.

But RWAs face some challenges. How do you prove a tokenized skyscraper isn’t a scam? Oracles like Chainlink verify off-chain data (such as property deeds and gold reserves), but regulators are wary. Still, RWAs could democratize access; imagine trading tokenized Tesla shares 24/7 or borrowing against your vinyl collection.

Benefits of Wrapped Crypto

Liquidity Enhancement

Wrapped tokens flood markets with fresh liquidity. Take Wrapped Bitcoin (WBTC): by turning BTC into an Ethereum-compatible token, it lets Bitcoin holders trade, lend, or stake on Ethereum DEXs. More WBTC in pools means tighter spreads and better prices for everyone.

This liquidity isn’t confined to one chain. Wrapped SOL on Ethereum or wrapped AVAX on other networks create interconnected markets. Traders swap assets across chains effortlessly, while liquidity providers earn fees from a broader user base. More liquidity means smoother trades and fewer slippage headaches.

Access to Diverse Ecosystems

Wrapped tokens are your all-access pass to blockchain features. Hold Bitcoin but want to use Ethereum’s DeFi apps? There is no need to sell your BTC. Instead, you can repurpose it.

They also incentivize innovation. Developers build cross-chain apps, knowing assets can move freely. Imagine a game on Solana that uses wrapped Ethereum NFTs or a Polygon DEX offering Bitcoin-backed loans. Wrapped tokens turn isolated tools into a unified toolkit, letting you mix and match blockchain perks.

Improved Capital Efficiency

Why let assets gather dust on one chain? Wrapped tokens let you deploy them everywhere. Use Bitcoin as collateral on Ethereum lending protocols without converting it to ETH. Your assets multitask, putting idle holdings to work.

This cuts costs, too. Moving Bitcoin natively means waiting for Bitcoin blocks, and fees rise when the network is busy. Wrapping it into WBTC lets you move it on Ethereum and its Layer 2 networks, where blocks come faster. Save money, skip delays, and keep your original asset’s exposure.

Risks of Wrapped Crypto

Custodial Risks

When you wrap crypto, you trust someone else to hold the original asset. Think of it like storing gold in a bank vault. If the bank gets robbed or goes bankrupt, your gold could vanish.

Most wrapped tokens rely on custodians, such as companies or DAOs, to keep the underlying assets safe. Suppose they’re hacked, like the $120 million BadgerDAO breach, or mismanage funds; your wrapped tokens might lose their 1:1 peg, turning into nothing. Even semi-decentralized models often depend on small groups of validators, creating a “too big to fail” risk.

Always ask: How transparent is the custodian about reserves? Do they have insurance? If the answer is vague, tread carefully.

Smart Contract Vulnerabilities

Wrapped tokens work strictly by their code. Smart contracts automate wrapping and unwrapping, but a single coding error can drain millions. For example, the Poly Network hack exploited a flaw in cross-chain logic, losing $600 million. Even audited contracts aren’t foolproof. In 2022, Nomad Bridge lost $190 million due to a minor code oversight.

Compliance Issues

Wrapping crypto can land you in regulatory gray zones. Let’s say you turn Bitcoin into wrapped Bitcoin (WBTC) on Ethereum. In the U.S., regulators might view this as creating a security or derivative, triggering SEC oversight.

In the European Union, MiCA regulations set licensing rules for crypto-asset issuers and service providers, and wrapped tokens can fall under them depending on how they are structured. Unwrapping during a regulatory crackdown might freeze your funds or force you to prove ownership. Tax-wise, wrapping and unwrapping could count as a taxable event in some countries, turning a simple transaction into a paperwork nightmare.

The main takeaway is that compliance isn’t just the custodian’s job. Using them could mean fines or legal action if you’re in a jurisdiction that bans crypto trading outright, such as mainland China. Always ask: Does my country treat wrapped tokens as securities, commodities, or something else? When in doubt, consult a professional.

What Will Wrapped Crypto Look Like in the Future?

The future of wrapped crypto will likely step away from relying on intermediaries. This shift toward trustless wrapping would cut out the risk of human error or greed. At the same time, new blockchain tech will determine how these tokens work. Layer 2 solutions could slash fees and speed up transactions, making wrapped assets as easy to use as sending a text.

Soon, you might see assets other than crypto tokens tokenized and wrapped for DeFi. From stocks to rare art, there are many viable contenders for wrapping. The catch is that regulators want to know who holds these assets. Compliance could turn into heavy paperwork, especially as adoption grows into sectors like gaming or supply chains.

Scalability will test this vision since more users mean more strain on networks. Developers will need to balance growth with security, guaranteeing the security of decentralized systems.

Conclusion

Wrapped tokens play a central role in blockchain interoperability, adding liquidity, and expanding the utility of crypto assets across multiple ecosystems. By enabling non-native tokens to function on different blockchains, they serve as practical bridges in DeFi. You can follow the protocols that use them on our DeFi hub.

While they introduce new opportunities, users should also be mindful of the risks, especially those tied to smart contracts and custodial mechanisms. As the crypto space continues to evolve, wrapped tokens will likely remain central to cross-chain innovation and DeFi growth.

Wrapped Crypto Tokens FAQs