They make you really believe that is more like a skill and if you are good at it, it works.
My friend told me that is just about how lucky you are, and not a skill.
So, should I stick with holding or playing day trade is a better option?
Trading is not a skill but can be actually learned through studying the market, there are a lot of wealthy people today in the market but still they cannot earn a huge amount of profit because they are bad on trading or they cannot handle the pressure sometimes when the market price are decreasing so they tend to sell their coins at the lowest price.
It requires skill when it comes to trading. Charting or doing TA's makes gives you ideas on how to enter and close trades. Wealthy people which are the whales play a big role in the market. Some of them lose but they are the ones who manipulates the market. So when bitcoin or altcoins dumps small traders panic and not the wealthy people.