Especially who's started trade with huge amount, when emotion is big factor, you can't control your emotion it will be very difficult, because your capital is big, if it will lose then you could be depressed so i would like to start trade with low capital, it it lose then i will not be highly affected for losses it's my own strategy.
Smaller or bigger - the thing that differs between the two is the person working with said capital.
That's why, at the start, it's wise to keep making small steps with smaller depo, to not to be loosing hope / ruining the expectations from your sessions.