If I lost most of my capital in one coin, I will hold the first to coin it up again, whether it can be called trading or not?
Give your opinion

Of course this can be called trading. You bought a coin and hold to sell it later; this is called long-term trading. Even if your coin has lost some value, it is not at all important to call your actions trading or not.
Although I'm very sorry to hear that. Everyone who bought the coins at the end of 2017 - 2018 and just hold their coins, today have certainly lost some of their investments.