Haven't nurturing this idea of trading a Bitcoin in the near future,but one question that's always come as a concern to me is. Is proper for me to trust a friend of that high magnitude ?
I try as much as possible not to allow monetary issues to come between me and my friends, from my personal experience I wouldn't advice it. If your friend is a very good and experienced crypto trader then let him mentor you, guide you on how to become a professional trader, instead of trading on your behalf. You can not become a real trader if someone else is doing it for you, you can start with demo trading and gradually start to improve your skills before starting actual trading. What if he's making profits and is telling you that he's loosing your money, how will you know without understanding how trading works?
Money can change people so you don't need to totally trust another person with a personalized business like Bitcoin and altcoins trading. You're better off hodling your Bitcoin while you improve your trading skills and do it yourself.