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Everything in this cryptocurrency industry is all about risk-taking. Even a professional trader will at a time lose money. What differentiates a good trader from a bad trader is whether they are running on losses or profits on the long run. You cannot use a very short time to measure the professionalism of a particular trader.
When you talk about copy trading it is also risky, but this time around the risk is more uncontrollable by the copy trader because the signals and method of trading is not emanating from the copy trader. It is rather coming from another person therefore, the copy trader might not be able to control the trade if things are going wrong.
All investments and strategies are inherently varied in risk - so each trader must adjust that risk to the extent of what they can afford to lose. Copy trading is one strategy that can make it easier for a trader to profit over other traders' strategies - but I wouldn't really recommend anyone to try it.
Successful traders are not only measured by how much returns they get - they also need to know a lot about how to do analysis and how the market works. A trader's performance is highly inconsistent from trader to trader - so copy trading is not a perfect way to adopt over time. It may be great for the early days as a beginner or non-experience trader, but they need to learn a lot to become independent traders.
However, I prefer copy trading to bots trading. I know all of them is risky, but the most important of them is that you should learn how to trade by yourself at least.
As long as you understand the risks and you do it wisely - then you can choose that strategy. But remember - don't get addicted.