"Unlearn and relearn" seems pretty simple/easy to say, but in reality its actually difficult to start learning what you have already learnt in the past, during green days you don't actually have to know much about trading to make profit, cause literally every coin on the market is pumping by then, so you just have to buy and take profit when the coins pumps, during the bearish season that's when you will see the real traders who still earn from trading, but sorry to ask how can someone unlearn what he/she has already learnt? There's nothing to relearn except he/she didn't pay attention and learn it well the first time.
You are right, because by relearning what is supposedly already known, there are many things that are going to be ignored, and those little details are what make the difference in trading. It is not easy to do it, but I prefer that a golden recommendation is that I can read books that are from traders, it does not matter that they are from the Sotck Market, I have always followed Wyckoff's teachings, of heho I have a material that is from the Wyckoff Academy and the configurations and different charts adapt to many situations that the BTC has gone through, and some cryptocurrencies, of course the course is: Beginners, medium and advanced, the truth is there are many configurations but it is worth it, I think with that type of theories consolidates what could never be learned since it is very complete.