Copy trading will only be profitable if you do it while you are starting to trade. But if it means copy trading throughout your trades, that won't be profitable at all.
It is better to be the trader that your trade is copied than the trader trying to copy traders. Just like deciding to join signal groups, deciding to just be a copy trader without any intention to be better means that you are only trading for a short time. Copy trading is more than just copying and pasting; it requires time, and a trader who does not have time to execute trades as quickly as a trader they are copying will not profit so much.
Another downside of copy trading is that you will also never be able to have the assurance that your profit will be continuous.