Lesson 01
Coin vs Token
Who is the citizen, and who is the tourist?
In the Ethereum world, not all assets are created equal. We have Coins (ETH) and Tokens (USDC, UNI, ORO).
ETH (Coin): This is the "native currency". It is indispensable for paying for transactions. Without it, you can't do anything.
Tokens: These are "smart contracts" built on top of the network. They are like passengers in a taxi – they must pay the driver (in ETH) to get anywhere.