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.
Obviously there's no such thing as 100 percent guarantee when it comes to trading a crypto. Who are them to predict this market, a god? You knew that but why you insist to subscribe on that channel for 250 dollars?
You only help the scammers there. No wonder why scammers are motivated on what they are doing because there are always people that they can easily fool. Expert traders are versatile and no matter what coins they use (long term or short) they can always make a way to profit. If you are still a beginner, don't copy them but stick first on the coins that are good for long term. You will only look like a hodler this way though.