Theres a 50 - 50 chance of getting profit in copy trading, as the people you copy might trade with a wrong direction thus might put your investment into liquidation. I would suggest to invest also in trading knowledge, enroll with a good and risk free trading course.
Risk-free word doesnt really suit out on any investment because no matter how good you are on a particular state it wont really be still meaning of 0% risk which is totally impossible.
As for copy trades then it would really be having that divided chance whether you do end up on getting profitable or would be losing your investment or capital
with the decision or hands of others which do really sucks but if you are pursuing this kind of system of your investment then go ahead but its really wise
on learning also into the other side of things at least.