There is a sense of satisfaction and pride that comes with knowing how to do stuff yourself. Something called self-efficacy. Before I go on I want to believe that what you mean is the regular crypto trade and not P2P. What I can say about trading Bitcoin yourself is that you get better through your wins and losses. It is a learning pathway for you. But when you do it through a friend including copy trading which some may argue is the best, you remain at the beginner trader level for a long time. A total waste of time and resources in my estimation. Trade your Bitcoin yourself through the rigorous process of learning or just hold your Bitcoin.
I have to agree with David here. Although it takes time at the end of the day the proof is in the pudding. You should ask yourself this question, "do I always want to rely on my friend to trade my bitcoin for me? or would I rather learn and go down the path less traveled & figure this out for myself?" I think the latter is always the best route to take. You will grow from that route, you will learn & become wise with trading or at least gain experience - even if you fail! Remember failing is not a bad thing, failing will only help you persevere if you keep trying and refuse to quit!