Okay, do you want to make 100% of profit or loss on your portfolio of $1,000,000?

or do you want to make 1% of $100,000,000 win or lose, you still get paid every year?

Because if you work with other peoples money, there's a LOT more of it, so you can trade 100x more often and size your positions over a greater range.

Source: I'm a quant