My early attempts at technical analysis didn't get me anywhere. It didn't really give good signals, and would change as the precious information changed. However this wasn't for crypto, but for forex. Crypto in general is a lot more explosive I think, and the news has a huge effect.
Technical analysis is not perfect wherein when you master it, you will not have a lose. Technical analysis is just a guide for you to have a basis for your trading and knowing when to buy and to sell. It would just let you speculate on what the future might be base on its past movements. It is sometimes a hit and sometimes a miss so the key here is to have a risk management by having a trading plan always and knowing the levels of buying and selling.
The technical side answers the question of when to buy and to sell exactly. For the fundamentals they most of the time interpret the bias of "what" to buy. But you can either use one of them for those queries.
It would be better to use the combination of fundamental and technical analysis along with market sentiment to have an edge of what might be the future price of the coin. It would guide you and be rational. There are still so many who lose when it comes to trading even if they are using both because they cannot get rid of their emotions.