2 What are trading platforms? (The big digital supermarket)
The platform (such as Binance, OKX, and others) isn't the one selling to you or buying from you; rather, it's just an "intermediary or centralized marketplace" that brings two people together:
A seller who wants to get rid of their currency in exchange for cash (the digital dollar USDT).
A buyer who wants to buy this currency.
The platform takes a very small percentage (a fee) in exchange for facilitating this process and providing security.
$BNB