Many new traders make this mistake when they get into the market. They rely more on luck and gut feelings than knowledge and experience, which is a wrong approach to trading and financial markets. You can't invest money in an asset only because you think it will become successful or gain value soon. Your decisions in a financial market must be based on logic, and logic only comes with knowledge and understanding of your actions.
You will most likely lose money in the long run if you are trading without knowledge. Some people, especially influencers on social media platforms, make it sound too easy. If you watch their videos and tutorials, they say a person can easily earn money through trading if they have good money, but why do they say this? It's because they need views, they earn money from it, they don't care about your profits or losses.
So, every individual needs to be careful with their money and don't waste them like this. Get into trading only if you know you can handle the market, and that is possible only if you gain enough knowledge before you get started.
It wasn't a mistake but it is intentional. We just need a common sense here even on any other things that are still new to us because we don't want to be in danger. As a newbie, it is only normal that they don't have an experience yet and this is something that can't be taught in the books or on online sources.
There are known solid assets already but it's not an excuse to just rely on guts and say it will always be like that because there are still other factors that can affect us like emotions for example and yeah, this can only be combated through enough experience.
As for the knowledge, we might not know that there are things like bear market and correction. So once the price fell down, we think something is wrong already and that is the start for us to do unwanted things.
There are videos like that that are clickbaits and they are the ones that are in for views but there are also those who can earn a commission if someone signs up on their link. They can as well earn for promoting the trading platform. Indeed that we must be careful with our money because money is not easy to earn nowadays and even if we say it was only given to us, we must still learn how to value it, as there are lots of people in the world who lacks in money.