I don't think there is a best strategy that can guarantee us 100% profit, I've tried to find and learn from many experts and have even subscribed to the YouTube channel by paying around $250 per month, but when I tried to do it on the market it turned out to be a loss too, I think for Becoming an expert trader is to choose coins that have long-term potential, after we buy, the next step is to just be patient to hold.
What happens is that the skills necessary to become a trader are completely different than the skills needed to become an investor, if you find out you are not doing well when you are trading the markets this could be for two reasons, the most obvious one is that your level of skill is still not high enough to trade the markets and make money with them, but the second reason could be that your mind is simply not geared towards trading, but if that is the case then you can just become an investor and obtain profits that way.