If I have the ability to predict prices, why waste time selling recommendations to others and I can earn thousands of dollars at a 0% risk.
As for those who make free recommendations do not trust them, some want fame, others want to create FUD, and in the end, no one gives you anything for free.
Generally, you can be an expert if you spend two hours of your time a day learning how to predict prices.
But they cannot say with significant certainty what the price is tomorrow, the following week, or the following month. They are experts in hindsight but not in foresight.
So don't waste your time building great hopes for things that aren't accurate.