For testing it is better to start with a very small bankroll. You will almost always lose first. Only when you grope your trading strategy is it worth making a weighty deposit. The deposit should allow you to meet the expected value of your trading, which will satisfy you.
You make this sound like you are gambling in a normal dice casino,,, and I guess the way you talk, this is exactly how many people like yourself approach trading! Saying you will almost always lose first means you enter to gamble, not to trade with strategy. You do realize how amateur this makes you look right?