Alice has a short-term bearish view on BTC prices, she believes the price of BTC will fall to $8,000 in the coming week. She believes an intrinsic value of $10,000 is a great way to hedge from the potential price fall. Alice borrows 20,000 USDT by pledging 2 acBTC as collateral in the acBTC 10,000/10D orderbook. If her view is accurate and the price of BTC falls through to $9,000 in the coming week, a liquidation event would occur and Alice would not need to repay the principal. In other words, Alice has effectively sold 2 acBTC for 20,000 USDT while the market value of the collateral is now worth 18,000 USDT at the time of liquidation.