$USDC Futures trading: you trade not real assets but contracts (agreements to buy or sell assets at a predefined price on a specific date in the future). Actually, you're not gonna own anything, you're just speculating on the price's movements of assets. You think SOL's price might fall significantly in the next days. You use 10 USDT to open a SHORT SOL position worth of 1000 USDT (100x leverage). (Same as you loan 10 SOL and sell them for 1000 USDT and later, if the SOL's price decreases to 50 USDT, you'll use 500 USDT to buy back 10 SOL, keeping the remaining 500 USDT as profit). $USDC