Op trusting a friend isn't out of place, have seen friends turn brothers and do almost everything together but then it's not really advisable in the area of trading or investing. Trading or investing are attached with significant risks that can result to profiting or loosing which one need to settle down to learn and know what method to go about with.

Trading through your trusted friend with a huge money might not be healthy firstly it might expose you to insecurities, secondly sometimes your friend may run loss, let's say one to three times your friend run loss you might start thinking that your friend is stealing or cheating you even when he is honest and you will see gradually how your beautiful relationship will crash.

It's best to learn and know about trading or investing yourself, then work in course of your study with the method that suit you instead of trading hugely through someone else.