Why the same coin shows up on twelve different networks

Open the asset list and you will see USD Coin once, with twelve small network marks beside it. Somewhere else you will see Ether and Wrapped Ether as two separate rows, both worth about the same. Neither of those is a display bug, and understanding why explains most of what is confusing about holding crypto across several networks.

The same name, twelve different contracts

A token is a contract living on one network. USD Coin on Ethereum and USD Coin on Base are two different contracts, at two different addresses, on two ledgers that cannot see each other. They are worth the same because the issuer redeems both for a dollar, not because they are the same thing. Sending the Base one to an Ethereum address does not work, in the way that a train ticket does not work on a different railway.

This is why the list groups by asset rather than by deployment. Twelve rows all called USD Coin would bury everything else and tell you nothing; one row, carrying the networks it lives on, tells you what you actually need to know: this is available to you, here are the places it exists.

Why the ticker sometimes carries a suffix

Some networks add a letter when a token arrives from somewhere else: AAVE.e, WETH.e. It marks a bridged deployment: the asset was locked on its home network and a stand-in was issued here. The stand-in is only as good as the bridge holding the original, which is a real distinction worth noticing, even though for the major assets on major networks it rarely matters day to day.

Ether and Wrapped Ether

Ether is the network's own coin. It pays for transactions and it is not a token, so it has no contract address. That turns out to be awkward, because most of the machinery built on Ethereum expects to talk to token contracts. Wrapped Ether solves it: you deposit Ether into a contract, the contract issues you an equivalent token, and that token behaves like every other. One Wrapped Ether is always redeemable for one Ether.

So they are listed separately, because they are separately useful, and their prices sit a hair apart because they are priced in different places. If a swap quotes you Wrapped Ether when you asked about Ether, that is usually the router wrapping on your behalf.

What this means when you are moving something

Check the network, not just the ticker. An address is valid on many networks, which is exactly the trap: a transfer sent on the wrong one is not rejected, it simply arrives somewhere you were not expecting. Before sending, confirm the receiving side supports that network. Melmex shows the network on the review screen for this reason, and it is the line worth reading twice.