Trading is risky you can make profit from here and also can loss a major part of your fund so you must have to take this opportunity before start trading. you shouldn't use big amount because you will not get any guarantee for profit from someone or yourself. that's why you should use such amount of money you are afford to loss.
Do not invest that kind of big amount on somebody to give you profit regardless of how you trust them. Why I do not want you to invest that big amount is because trading is not guaranteed to be successful. That time that you give out the money might just be the moment that they get their analysis wrong or the market has other plans and all his efforts goes to waste as the market goes the complete opposite of everything that he thought will happen. The pressure of having others money for trading can also make him to not have his mind in order and does something wrong to make him lose the money. We should invest in ourselves by learning how to become a trader and use our own money to trade instead of depending on others for profit.