𝗜𝗳 𝘆𝗼𝘂’𝘃𝗲 𝗲𝘃𝗲𝗿 𝘁𝗿𝗶𝗲𝗱 𝘁𝗼 𝘀𝗲𝗻𝗱 𝗨𝗦𝗗𝗧 𝗮𝗻𝗱 𝗱𝗶𝘀𝗰𝗼𝘃𝗲𝗿𝗲𝗱 𝘁𝗵𝗮𝘁 𝘆𝗼𝘂 𝗻𝗲𝗲𝗱𝗲𝗱 𝗘𝗧𝗛 𝘁𝗼 𝗽𝗮𝘆 𝘁𝗵𝗲 𝗻𝗲𝘁𝘄𝗼𝗿𝗸 𝗳𝗲𝗲, 𝘆𝗼𝘂’𝘃𝗲 𝗮𝗹𝗿𝗲𝗮𝗱𝘆 𝘀𝗲𝗲𝗻 𝘁𝗵𝗲 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝗰𝗲 𝗯𝗲𝘁𝘄𝗲𝗲𝗻 𝗮 𝗰𝗼𝗶𝗻 𝗮𝗻𝗱 𝗮 𝘁𝗼𝗸𝗲𝗻 𝗶𝗻 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲. It can be confusing at first. You have USDT in your wallet, you enter the recipient’s address, and you expect the transfer to go through. Then the wallet tells you that you also need ETH. Why? Because USDT and ETH play different roles. A blockchain is a digital network that records and verifies transactions. You can think of it as a shared system that allows people to transfer digital assets without relying on one central company or database. A coin is the native currency of its own blockchain. For example: — Bitcoin (BTC) runs on the Bitcoin blockchain. — Ether (ETH) runs on Ethereum. — SOL runs on Solana. These coins are not just assets people buy and sell. They are also used to pay for activity on their respective networks. If you send BTC on the Bitcoin network, the transaction fee is paid in BTC. If you send ETH on Ethereum, the fee is paid in ETH. If you use the Solana network, fees are generally paid in SOL. A token, on the other hand, is a digital asset created on top of an existing blockchain. It does not need to operate on a separate blockchain of its own. USDT is one of the most familiar examples. It is a stablecoin designed to track the value of the US dollar, but it can be issued on several different blockchains, including Ethereum, Tron, Solana, and others. That means there is not just one version of USDT in every practical sense, the network it’s on matters. USDT held on Ethereum is different from USDT held on Tron or Solana because each version uses a different network. The balance may still be shown as USDT, but the transaction rules and fee requirements depend on the blockchain being used. This is where many people run into trouble. Suppose your USDT is on Ethereum. To send it, you will usually need some ETH in the same wallet to pay the Ethereum network fee. Your USDT is the asset being transferred, but ETH is what pays the network to process and confirm the transaction. Having enough USDT does not necessarily mean you have enough to send it. If your USDT is on Tron, you may need TRX instead. If it is on Solana, you will generally need SOL. The required fee currency depends on the network where the token is located. This is also why choosing the correct network when depositing or withdrawing crypto is so important. Sending an asset through the wrong network can cause delays, extra costs, or, in some cases, make the funds difficult to recover. Coins and tokens can also serve very different purposes. Some tokens are used for payments or transfers. Others give holders voting rights in a project. Some provide access to a product or service, while others are designed to represent assets, rewards, or ownership within a particular system. A coin is not automatically better, safer, or more valuable than a token. The distinction mainly describes how the asset relates to a blockchain. In simple terms: ➥ Blockchain: the network that records and verifies transactions. ➥ Coin: the native currency of its own blockchain. ➥ Token: a digital asset built on an existing blockchain. ➥ Network fee: the payment required to process a transaction. ➥ Fee currency: the coin used to pay that network fee. So, if you remember only one example, remember this: USDT may be the asset you want to send, but ETH, TRX, or SOL may be needed to pay the network fee, depending on where that USDT is held. Quick question; before today, did you know that ETH is a coin while USDT is a token?