There was a time I blindly traded on deriv Dtrader app and I made over 2k dollars in less than 48 hours, let me say out of luck, without having a personal strategy or using any strategy from anyone. Though I started with a $100 account which gave me an edge.
There are people who use others strategies to trade which also yielded great profit for them without having any personal strategy. I have also heard and seen people also say that using others strategies is even more better since it saves you more time and stress of having to figure out a personal strategy.
It's okay to copy a working strategy, that's how it goes even the best traders have done it. It may look easy at the beginning because you're just literally copying what they're about to do.
But what if they hide what they do and you don't have a way knowing what they're up to? That's the time that you need to build on your own and even you copy theirs, you still need to rely on your own decision after all.
Not all the time that you'll look at them and wait for their decision and you'll also do what they do. It's good that you've made a lot from doing so but not at all times you'll end up with the same result.