This is not recommended, I know that in the world of fiat giving your money to a money manager to trade for you and make those difficult calls that you cannot make when trading is very common and it is even encouraged, but in this market this is simply bad idea and this is because once you give up your coins to someone else you have no control over those coins and there is no way for you to get them back and when you add the pseudonymous nature of bitcoin it will be almost impossible to track down the person behind the online identity he has created, as such there is a very high risk that you will never see your coins and you will be the victim of a scam.