Yep, that is a good point, Samuel.
It happens often that beginner traders will put all of their money into trading. When I was working for brokers I saw that over 70% of the people do it.
And you can guess what happens – over 90% blow their accounts in the first 1 month.
Opening a bigger account does not mean you have to put all of the margin into trading, and definitely it doesn’t mean you will profit more.