you have to minimize the risk of losing money or else you will see your funds eaten by the whales.
In my opinion, imagining that all the market volatilities are caused by whales is definitely a misconception. See, recently China's new policy against cryptocurrencies triggered a bear trend which might led whales also booking losses but most people are still blaming whales for manipulating markets. Other than that, I agree with you that if we are not taking care of risk management then all our capital will be lost in no time.