A chain’s native asset — the one that pays fees — predates the token standard that everything else follows. It therefore does not behave like a token: contracts written to handle tokens generically cannot handle it without a special case.
Wrapping solves that. You deposit the native asset and receive a token backed one-for-one by it, which behaves exactly like every other token. That is the whole idea. WETH is ETH in a standard wrapper; WBTC is a claim on Bitcoin represented on a chain Bitcoin does not run on.
Why it matters for reading liquidity
Because pools are built on the wrapped version, so that is where the depth is. A list of on-chain pools showing WETH pairs rather than ETH pairs is not a mistake — it is the actual structure. Anyone filtering out wrapped assets as noise would delete most of the chain’s real liquidity.
It is also why the wrapped native asset appears at the top of every turnover ranking, as one half of the routing pair described in routing pools versus real demand. It is the intermediate hop for most trades on the chain, so it accumulates turnover from everything else that happens.
The two are not equally safe
Here the distinction stops being pedantic. Wrapping a chain’s own native asset is close to mechanical: the contract holds the deposit and the redemption is enforced by the same chain the asset lives on.
A cross-chain wrapper is a different animal. A token on one chain representing an asset held on another is only as good as whatever holds the asset and honours the redemption — a custodian, a bridge, or a set of validators. The token can trade at par indefinitely and still be a claim rather than the thing itself.
That distinction does not appear in a price chart. Both read as a number tracking the underlying, right up until they do not.
What it costs
Wrapping and unwrapping are transactions, so they carry network fees, and on a busy chain that is a real line in a round trip. More importantly, holding a wrapped asset means holding whatever the wrapper depends on, which is a counterparty question rather than a market one.
None of which is an argument against them — they are unavoidable if you want to trade on-chain at all. It is an argument for knowing which kind you are holding, and for treating a wrapped ticker as a different asset from the thing it names, because that is exactly what it is.