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.
There is no invest that is 100% risk free. Some people make good returns from copy trading when they have a real source whose strategies are working. However there used to be some drawbacks. One of which when you don't know the kind of strategy that someone you are copying has. Even if you are using a small lot size, you could end up blowing your account when more slots are opened more than your account could hold. Failure to follow every step may make you not to be successful in the end.
So, even when you are copy trading, you need some minute skills to manipulate the process.