$USDC

The current market is fluctuating greatly with back-and-forth movements. Opening several contracts has resulted in stop-loss exits. It's still better to use USDC for grid trading. Just take advantage of this back-and-forth fluctuation. Plus, there are no trading fees. I tested it yesterday, and there was profit from trading ETH in a $1 interval on the grid. However, if trading in USDT pairs, after deducting a $2 interval for fees, it results in a loss. Therefore, whether it's grid or contract trading, especially high-frequency trading, everyone should know how to choose.