0DTE SPX options are best for day trading if you can handle them. Huge leverage, but time decay is an issue for OTM SPX options the closer the end of session comes. That is the difference to Futures and the spread is much bigger. But during the last weeks there were days when 2000$ could turn to 9000$ with one option.
That's nothing, there were multiple 30x to 50x+ opportunities in SPX/NDX lately.