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.
But the problem is that as OP shared, he has no intention of becoming a bitcoin trader in the near future . What he wants is to be able to make money from the market without spending time on it and relying on friends is the solution he is thinking of.
I agree that using money in relationships is very risky because it not only causes us to lose money but can also cause our relationships to fail . Therefore , OP needs to consider carefully when making the final decision . But I think this is the same as when we look for partners and colleagues to do business together, so if OP can take risks and really trust his friend, he can try . In my opinion , the important thing is that we need to calculate the risk, and if we are ready and accept it , we can do whatever we want.