Trading needs a lot of researches and analysis like financial analysis,market analysis.Unless you know the previous and current market situation of a coin,it will not be able to find the coin which is most under valued.
its need complicated analysis and not everyone can do this.even an expert ,they learn all about analysis more than years before could earn money and profits.
Your statement is wrong but I think you want to say it right. We can't call an expert if that person is not capable of the skills of being expert right? I guess what you want to say is that before they became experts, they started to someone who doesn't know this kind of things. Earning money is hard work, but if you are a good worker and enjoying what you are doing, it is not that hard really.
Trading needs time and it is much more on managing any decision making so if you want to start trading you must know the basics such buying when it is low and selling when it is high. It not actually a guessing rather it is analyzation with basis. And the basis you may have is the price itself where you need to monitor it on a graph or on the market gap. More on analytical and management.
we need to learn more lesson in trading so we can buy in the right price and sell with the right price too and we can analyze the coins. after we have learn, we need to practice with the coin in the market so we can get something, at least we can try to make profit. after we trying trading in many times, i hope you can be familiar in trading so in future, you can make profit you want.