For cryptos Fundamental analysis is about dominance, special events like halving or monitoring big whale movements.

Technical analysis is all about price pattern recognitions.

I think you should use both. The former will give you a long time horizon while the latter is more useful for short/medium term decision

If you want to know more about the differences I suggest you this article. (disclaimer I am the author)

https://cryptoexcel.live/fundamental-technical-analysis/