Guide · Risk Management
What Is a Crypto Bridge? And Why It's a Favorite Hacking Target
Moving an asset from one blockchain to another isn't as simple as it sounds — most of the time, nothing actually moves at all.
A crypto bridge is infrastructure that lets an asset move between two otherwise incompatible blockchains — say, from Ethereum to a separate chain like Solana. Since a coin native to one blockchain fundamentally cannot exist directly on another, most bridges actually work by locking the original asset in a smart contract on its home chain and minting a corresponding "wrapped" representation of it on the destination chain, rather than genuinely transporting anything.
That wrapped token is meant to be fully backed, one-to-one, by the locked original sitting in the bridge's contract — in principle, redeemable for the original asset at any time by reversing the process. The bridge's entire security model depends on that locked reserve actually being safe and correctly accounted for, since the wrapped tokens circulating on the destination chain are only worth anything as long as people trust that backing is real and complete.
That concentrated pool of locked assets is exactly why bridges have become one of the most frequently and severely exploited targets in crypto — a successful hack that drains a bridge's locked reserves can leave the wrapped tokens still circulating on the destination chain suddenly backed by nothing, and several of the largest crypto hacks on record, cumulatively worth billions of dollars, have specifically targeted bridge contracts rather than exchanges or individual wallets.
The practical takeaway for anyone actually using a bridge is that "wrapped" versions of an asset carry a layer of smart-contract and custody risk that the original, native asset doesn't — a risk worth understanding before moving real capital across chains, and testing how a wrapped asset's price tracks its native counterpart is available on Trade2Spike without any bridge risk actually attached to it.