I agree if you hold the right coin. Not to be panic is relative hard for newbie. Sometime your experience little bit in different condition, that's why people cannot learn from their experience instantly.
And how do you know if its the right one?
I try to analyze news and rumors, but not all of them behave the same and trading rates
Good question there, because everyone has their own definition of the "right coin". Some are just basing on their intuition and out of thin air they believe that its the "right coin". While others tends to check the historical data of a certain coin, check the market/trading volume and other technical stuff. Every coin or token could be right as long as youre making profit out of it, if not, then its more likely you have the "wrong coin".