Why do people lose money in crypto? the number one reason is panic, they tend to be controlled by emotion, for newbies never ever just bought something you really know nothing about, that's one of the rule, research is needed, your money is important so don't waste it with wrong decisions, if you decided to what coin to buy, don't sell with small movement crypto is volatile, make some target for losses and earning.
Yep, I agree with you, the key is to use your logic to think, don't use your hunches or feelings. Analyze the situation using logic and don't eat FUD news or rumors that shake your decision. You must be good at filtering news/information, whether this information is true or false. Mostly, traders always eat wrong information and just go along with it without analyzing the price movements of the crypto asset.